A " candid" picture or photograph is something that is taken without you, typically, realizing it.

“偷拍” 照片或照片是在你没有意识到的情况下拍摄的， 通常是没有意识到的。

Someone is taking a picture of you reading or a picture of you talking and you don't know that they are taking a picture of you, that would be a candid picture.

有人在拍你读书的照片或你说话的照片，而你不知道他们在拍你的照片，那将是一张偷拍的照片。