They operated under the umbrella of the police.

他们在警方的掩护下采取了行动。

That store was a front for foreign agent.

那家商店为外国间谍打掩护的。

The invaders attacked under a cloak of fog.

侵略者在大雾的掩护下发动了进。

The commandos pushed forward under the covering fire of their artillery.

队在炮兵的火力掩护下向前推进。

Some claimed that the docker’s union fronted for the smuggling ring.

某些人声称码头工人工会集的掩护所。

They hoped to get into the enemy fortress under cover of darkness.

他们希望在夜幕的掩护下进入敌人的要塞。

Some claimed that the doctor's union fronted for the smuggling ring.

有人说医师公会集的掩护机关。

The army mounted the invasion under cover of darkness.

军队在夜色的掩护下发动。

It is laziness and waywardness, however, that causes one to give himself up as hopeless and back down on the pretext of "no interest".

只有懒惰与任性，才能使一个人自甘暴弃的在“趣味”的掩护之下败退。

"The robber broke into the bank at the storm night, gambling on the fact the night watchers wouldn't find it because of the thunder and lightning."

"(喻)强盗在狂风暴雨的夜里闯进了银行,抱着孤注一掷的心情,希望在电闪雷鸣的掩护下,不致被守夜人发现。"