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1·They move under cover of darkness.

他们在黑夜的掩护下行进。《柯林斯英汉双解大词典》

2·Later, under cover of darkness, they crept into the house.

后来他们在夜幕的掩护下溜进了房子。《牛津词典》

3·They managed to escape under cover of darkness.

他们设法在夜色掩护下逃跑了。《牛津词典》

4·They acted under cover of the police.

他们在警方的掩护下采取了行动。

5·Under cover of the night they crossed over.

在夜色掩护下，他们投奔到我们这边来了。

6·Under cover of friendship they betrayed him.

打着友谊的幌子，他们出卖了他。

7·Under cover of the dark, the dog was stolen.

在黑夜的掩护下，狗被偷走了。

8·The enemy attacked us under cover of darkness.

敌人乘黑夜袭击我们。

9·The attack jumped off under cover of a barrage.

进攻在炮火的掩护下开始了。

10·The yacht made landfall under cover of darkness.

游艇在夜幕的掩护下靠岸了。