1. Please make sure to wear a cap when you go outside to protect yourself from the sun.
请确保在外面时戴上帽子，以保护自己不受阳光的伤害。

2. The bottle cap was difficult to unscrew, so I had to ask for help.
这个瓶盖很难拧开，所以我不得不寻求帮助。

3. The company has set a cap on the number of attendees for the event.
公司已经设定了活动参与者的上限。

4. The athlete proudly wore his country's flag on his cap during the opening ceremony.
这位运动员在开幕式上骄傲地佩戴着他国家的国旗帽。

5. The government plans to cap the prices of essential goods to prevent inflation.
政府计划设定必需品的价格上限，以防止通货膨胀。

6. I lost my cap on the bus yesterday, so I had to buy a new one.
昨天我在公交车上丢失了我的帽子，所以我不得不买一顶新的。