essence 成语

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time is of the essence

it is important to work as quickly as possible, make hay while... When you're paying $75 an hour for a lawyer's services, time is of the essence.

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in essence

in its nature；as a matter of fact在本质上；实质上
In essence，both proposals are much the same．这两个建议实质上是差不多的。
Officially he is in charge，but in fact his secretary does all the work．从职位上讲是他负责，但实际上，他的秘书做所有的工作。

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essence

essence
1.
in essence
essentially
2.
of the essence
of the greatest importance

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of the essence

of the essence
Of the greatest importance, crucial, as in Time is of the essence. This idiom, which uses essence in the sense of “the most important element of something,” was first recorded in 1873, although the phrase the essence of ... was already being used in the mid-1600s.