the use of military aircraft to provide protection against attack by enemy aircraft during ground or naval operations
you can t tell a book by its cover Idiom, Proverb
blow my cover
reveal my true identity, reveal my hiding place With a false passport, I can enter Bali, if nobody blows my cover.
blow one's cover
Idiom(s): blow one's cover
to reveal someone's true identity or purpose. • The spy was very careful not to blow her cover. • I tried to disguise myself, but my dog recognized me and blew my cover.
break cover Suddenly emerge from a hiding place, as in The shots distracted our pursuers long enough so that we could break cover and make a run for it. This term originally alluded to animals being hunted, a frequent usage in the 16th century. Now that hunting is a less common pursuit, it is used for human beings.
to deal with much information and many facts. • The history lecture covered a lot of ground today. • Mr. and Mrs. Franklin always cover a lot of ground when they argue.
cover a lot of ground|cover|ground
v. phr. To process a great deal of information and various facts. Professor Brown's thorough lecture on asteroids covered a lot of ground today.
Cover all the bases
If you cover all the bases, you deal with all aspects of a situation or issue, or anticipate all possibilities. ('Cover all bases' is also used.)
Idiom(s): cover for sb
to make excuses for someone; to conceal someone's errors. • If I miss class, please cover for me. • If you're late, I'll cover for you.
cover for me
make an excuse for me, do my work I may be late for work today. Will you cover for me?
cover girl An attractive woman whose photograph is featured on a magazine cover; also, a woman attractive enough to be so featured. For example, All models hope to be cover girls some day, or She's gorgeous—a real cover girl. [c. 1910]
n. A pretty girl or woman whose picture is put on the cover of a magazine. Ann is not a cover girl, but she is pretty enough to be.
talk about the important facts and details of something The number of questions seemed endless and we were unable to cover much ground during the meeting.
cover ground|cover|cover the ground|ground
v. phr. 1. To go a distance; travel. Mr. Rogers likes to travel in planes, because they cover ground so quickly. 2. informal To move over an area at a speed that is pleasing; move quickly over a lot of ground. The new infielder really covers the ground at second base.Herby's new car really covers ground! 3. To give or receive the important facts and details about a subject. If you're thinking about a trip to Europe, the airline has a booklet that covers the ground pretty well.The class spent two days studying the Revolutionary War, because they couldn't cover that much ground in one day.
fill up；complete the covering of 填满；装好…顶或盖 They have covered in the whole market．他们给整个商场盖上了一个顶篷。 We decided to cover in the passage between the main building and the annex．我们决定在主楼和建筑物之间的过道上加盖屋顶。 With everybody helping，they had the ditch covered in in no time．由于大家帮忙，他们一下子就把那条沟填满了。
cover one's ass
cover one's ass Also, cover one's hide or oneself. Make excuses or otherwise take action to avoid being blamed, punished, or harmed. For example, The first thing you learn in the army is to cover your ass, or Jane is ingenious at finding ways to cover her hide. The first phrase, considered vulgar slang, dates from the 1960s; the variants are more polite.
cover one's tracks
Idiom(s): cover one's tracks (up)
to conceal one's trail; to conceal one's past activities. • She was able to cover her tracks up so that they couldn't find her. • It's easy to cover up your tracks if you aren't well known. • The robber failed to cover his tracks.
cover one's tracks|cover|cover up one's tracks|tra
v. phr. 1. To hide and not leave anything, especially foot marks, to show where you have been, so that no one can follow you. The deer covered his tracks by running in a stream. 2. informal To hide or not say where you have been or what you have done; not tell why you do something or what you plan to do. The boys covered their tracks when they went swimming by saying that they were going for a walk. Compare: COVER UP1.
cover sth up
Idiom(s): cover sth up
to conceal something. • They covered up the truth about the crime. • We'll cover this little matter up and make up a story for the press.
cover story 1) A featured story in a magazine that concerns the illustration on the cover, as in The earthquake is this week's cover story for all the news magazines. [Mid-1900s] 2) A false story intended to mislead or deceive; also, an alibi. For example, Their cover story while investigating local repair services was that they had just bought the house and were having problems, or The suspect gave the police some cover story about being held up. [Mid-1900s]
cover the field
cover the field Also, cover the territory or waterfront. Be comprehensive. For example, The review course will cover the field very well, or Bob's new assignment really covers the territory, or The superintendent's speech covered the waterfront on the drug problem. These expressions all employ the verb cover in the sense of “extend over” or “include,” a usage dating from the late 1700s, with the nouns (field, ground, territory, waterfront) each meaning “whole area.”
cover the waterfront|cover|waterfront
v. phr. To talk or write all about something; talk about something all possible ways. The principal pretty well covered the waterfront on student behavior.
1．cover completely；protect with clothing，etc．盖严；用衣服等把…裹起来 He covered the child up with a blanket．他用一条毯子把孩子盖严。 It's very cold outside and you should cover up warmly．外面很冷，你要穿暖和些。 2．hide sth．wrong or bad 掩盖；掩饰 Lies cannot cover up facts．谎言掩盖不了事实。 No pretty words can cover up its aggressive acts．漂亮的言辞掩盖不了它的侵略行径。
v., informal 1. To hide something wrong or bad from attention. The spy covered up his picture-taking by pretending to be just a tourist.A crooked banker tried to cover up his stealing some of the bank's money by starting a fire to destroy the records. Compare: COVER ONE'S TRACKS2. 2. In boxing: To guard your head and body with your gloves, arms, and shoulders. Jimmy's father told him to cover up and protect his chin when he boxed. 3. To protect someone else from blame or punishment; protect someone with a lie or alibi. Often used with "for". The teacher wanted to know who broke the window and told the boys not to try to cover up for anyone.The burglar's friend covered up for him by saying that he was at his home when the robbery occurred.
cover your ass
protect yourself by having documnets signed etc. If you discipline or dismiss an employee, cover your ass.
hiding something from the authorities or media The reporter heard about the cover-up of police brutality.
n., slang A plan or excuse to escape blame or punishment; lie, alibi. When the men robbed the bank, their cover-up was to dress like policemen.Joe's cover-up to his mother after he had been fighting was that he fell down.
covered-dish supper|covered-dish|potluck|potluck s
A meal to which each guest brings a share of the food. Dolly made a chicken casserole for the covered-dish supper.
Don't judge a book by its cover.
Don't judge by appearances.
Don't judge a book by the cover
This idiom means that you should not judge something or someone by appearances, but should look deeper at what is inside and more important.
duck and cover
Idiom(s): duck and cover
to dodge something, such as an issue or a difficult question, and attempt to shield oneself against similar issues or questions. (Also literal, referring to ducking down and taking cover to protect oneself. Fixed order.) • The candidate's first reaction to the question was to duck and cover. • The debaters were ducking and covering throughout the evening.
got him covered
point a gun at him, prevent him from going """I've got you covered!"" the boy said, pointing a toy gun at me."
judge a book by its cover, one can't
judge a book by its cover, one can't One can't rely on outward appearances to know what something or someone is really like. For example, He seems very quiet, but you can't judge a book by its cover. [First half of 1900s]
multitude of sins, cover a
multitude of sins, cover a Compensate for numerous evils, as in You may not be offering to help with the fair, but that big donation covers a multitude of sins. This expression originated in the New Testament (I Peter 4:8): “And above all things have fervent charity among yourselves: for charity shall cover the multitude of sins.”
regain health from恢复健康 A healthy child quickly recovers from a fever．健康的孩子发烧后康复很快。
hide, find a safe place If the soldiers begin shooting, you guys take cover.
v. phr. To seek shelter or protection. The rain began so suddenly that we had to take cover in a doorway.
hidden；concealed隐藏；掩蔽 He kept his invention under cover until it was patented．在取得专利权以前，他对他的发明一直保守秘密。
adv. or adj. phr. Hidden; concealed. The prisoners escaped under cover of darkness.He kept his invention under cover until it was patented. Compare: UNDER WRAPS.
You Can't Judge A Book By Its Cover
Decisions shouldn't be made primarily on appearance.
you can't tell a book by its cover
the cover or surface does not reveal its contents, beauty is only skin deep If you buy a car because it looks nice, remember this: you can't tell a book by its cover.