A small room; a cubbyhole; a small secluded room; a small compartment.

有小房间，小隔间（橱），隐蔽的小房间，等等意思。具体翻译要看上下文而定。

This business is a cover for unlawful activity.

这家商行是搞非法活动的隐蔽处。

We should learn to fight with enemy in an overt and covert way.

我应学会同敌人做公和隐蔽的斗争。

Students protested covert actions undertaken by the CIA.

学生抗议中央情报局的隐蔽举动。

We shot them out of their hiding places.

我向隐蔽的地方来。

These pigs had acquired lungworm infestations presumably containing masked influenza virus under natural conditions.

这些猪在自然条件下已受到含有隐蔽流感病毒的肺丝虫寄生。

Some people like to strip themselves naked while they have a swim in a secluded place.

一些人当在隐蔽的地方游泳时,喜欢把衣服脱光。

Here's the cyanea's-eye view of a reef flat that seems like nothing but a couple of billion hidey-holes.

这是霞水母章鱼看到的珊瑚，看起来什么也没有，只有上亿个隐蔽的小孔。

Public violence compels especially women and the old to retreat into private laager because they find everything around them threatening.

公的暴力行为尤其迫使妇女和老人退到一个隐蔽的私人的安全地带,因为觉得周围的一切都对有威胁。

As a rule the swine infested with the lungworms carrying the "masked virus" did not develop swine influenza immediately upon infestation with the lungworm.

通常，受到携带了“隐蔽病毒”的肺丝虫侵袭的猪，并不因肺丝虫的侵袭立即发生流感。