to put someone at risk for a second, third, etc. time from something harmful or unpleasant

There are better ways of overcoming a psychological injury than re-exposing the victim to his trauma.

The dog was placed in a nonallergenic environment for 14 days, then reexposed to its normal environment. 狗被放置在非过敏环境中14天，然后重新暴露在正常环境中。

to remove what is covering something for a second, third, etc. time so that it can be seen

We must carefully weigh the risks of worsening the pollution by re-exposing the buried coal tar.

She made a photo that never happened by re-exposing the film to take a picture of two people at separate times. 她通过二次曝光胶卷在不同的时间分别拍摄两个人的照片，从而合成了从未发生过的双人照。