He ran a construction company as a cover for drug dealing.

他经营了一家建筑公司，作为毒品交易的掩护。

《柯林斯英汉双解大词典》

His work as a civil servant was a cover for his activities as a spy.

他以公务员的工作作为搞间谍活动的掩护。

《牛津词典》

Those who are kept on beyond that age must be given six months' notice of any attempt to “retire”them, lest it be used as a cover for sacking.

在引退那些65岁以上的人之前，必须提前6个月发通知，以免以此作为解雇的借口。

youdao

Their waste then acts as a cover.

VOA: special.2010.07.13

And as you can see, in addition to the introduction, the cover advertises also a portrait of the author.

你们可以看到，除了引言，封面的宣传也是作者的画像。

耶鲁公开课 - 现代诗歌课程节选

It's made of strong metal, it's got very thin slits to be able to see straight ahead, covered up; everything else is covered up, a good one will cover your neck as well.

头盔是坚固的金属制成,正面有一条很细的开口能让士兵看到前方,左右两边都包住,剩下所有地方都包住,好一点的头盔甚至能保护颈部

耶鲁公开课 - 古希腊历史简介课程节选

The first scrutineer uses the plate as a cover when shaking the receptacle to mix the ballots.

NPR: The Papal Transition: An Overview

They could have gone with DeSean Jackson, who they worked with as a cover athlete for NCAA Football 09.

FORBES: Connect

Pitt's allure as a cover model comes as no surprise to Trunzo.

FORBES: Fab Tab Cover Stars