In some cases goat has been passed off as lamb.

在某些情况下山羊会被假冒为羔羊

To use and pass off as one's own (the ideas or writings of another).

把(他人的观点或文章)作为自己的使用。

I feel very young and can easily pass off as a girl for a long, long time.

我觉得很年轻，很容易通过，作为很长一段时间，姑娘了。

This overly ambitious corporate climber never heard a good idea he wouldn't pass off as his own.

太有野心的“职场攀爬者”从来都觉得每一个好点子都出自他自己。

Persistent balance problems are not something you should pass off as a harmless part of the aging process.

你不能把顽固的平衡问题看成是无害的衰老过程的一部分。

Then in the reptile house, keepers had placed two giant sea cucumbers which they were trying to pass off as snakes.

在爬行动物区，饲养员放了两只巨大的海参，以此充当蛇。