趁着的英文：
under the cover of

参考例句：

They did it under the cloak of darkness.
他们是趁着黑夜干的。

Exploit a situation for one's own advantage
趁着形势谋取私利

`Psst! Let's get out now before they see us!'
｀嘘!趁着现在他们没看见,咱们走吧!＇

Let's cash in on the fine weather and go fishing.
让我们趁着这好天气去钓鱼吧！

We took advan-tage of it by going for a ride.
我们趁着这一大好时光来了个乘车兜风。

He decided to write it while still in the atmosphere of madrid
他决定趁着还在马德里的时候来写这篇文章。

Finally, towards evening we were on the way back to Chengdu.
最后，我们趁着暮色踏上了返回成都的旅途。

While the otter is going about this task, the rabbit fashions a noose from tree bark.
趁着水獭抓鸭子的工夫，兔子用树皮做了一个绳套。

They headed to their local bars and grabbed a few cold ones -- while they were still cold.
他们来到当地的酒吧,争着要冰冻的酒水饮料--趁着它们还有点冰的时候。

I must remember to eat the tuna before he spoils in order to keep strong
为了保养身体，我一定要记住趁着金枪鱼没有腐烂的时候就把它吃掉。

under是什么意思：
prep. 在…下面；少于adv. 在下面
adj. 下面的，较低的

Under the hammer
被拍卖

under the ground;swam under water.
在地下；游到水下

Under water, famine; under snow, bread.
洪水造饥馑，瑞雪兆丰年

The coin rolled under the bed.
硬币滚到床底下去了。

You are under the scrutiny of the police
你现在受到警察的监视。

cover是什么意思：
v. 遮盖；掩饰；包含；采访；给...保险；顶替
n.. 遮盖物；封面；掩护；保险；借口；餐具

Cover as if with a shroud.
仿佛用覆盖物掩饰着。

To be covered with or as if with fog.
为雾笼罩被或好象被烟雾掩盖

Covering: The fixing of a book cover to the spine and end papers .
上书皮:把书皮粘贴于书和纸上。

Snow covered the mountain. = The mountain was covered with snow.
白雪漫山

A light, padded bed covering.
羽毛被一种轻质且柔软的床罩