black sheep ------ 另类（成语）

英文释义

(IDIOM) An outcast, disgraced, or non-conforming member of a group, such as a family.

例句

My sister was always the black sheep in our business-minded family, and no one was surprised when she became an artist.

我妹妹一直是我们这个有着生意头脑的家庭的另类，对于她后来搞艺术，家里没有人感到奇怪。