cover可以用作动词释义之一 An insurance policy that covers a person or thing guarantees that money will be paid by the insurance company in relation to that person or thing. 保险

例句 Their insurer paid the $900 bill, even though te policy did not cover it. 他们的保险公司赔付了他们$900，尽管保单并没有严格保到此项。

cover可以作名词释义之一 something that is a cover for secret or illegal activities seems respectable or normal, and is intended to hide the activities. 掩护

例句 He ran a construction company as a cover for drug dealing. 他经营了一家建筑公司，作为**交易的掩护。

短语有from cover to cover 从头到尾

例子 She read the book from cover to cover. 她从头到尾读了这本书。

cover up 掩盖

例子 He suspects there's conspiracy to cover up the crime. 他怀疑有掩盖这桩罪行的阴谋。