It was a lesson to me not to follow fads.

这对我来说是个教训，即不要赶时髦。

youdao

A group won't be smart if its members imitate one another, slavishly follow fads, or wait for someone to tell them what to do.

如果一个群体的成员只是互相模仿，不知所谓地追求时尚，或总是等着别人告诉他如何行动的话，那么这个群体就不可能是智慧的群体。

youdao

University students should have the resolve to live a frugal lifestyle and should not try to keep up with the Joneses or follow trends and fads .

大学生应该有决心过节俭生活，不要和别人比阔气或追求时尚；

youdao