人们用表达 “be a hard act to follow” 来形容一个人在某件事情上树立了一个很好的榜样，而其他人很难保持或达到同样的标准。你既可以用这个表达来形容某人的一次具体表现让人相形见绌，也可以用它来泛指 “某人非常成功，让后来者望尘莫及”。
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例句
It's such a pity that Fang Zhu's leaving – she'll be a hard act to follow.
真可惜，方竹要离开了。她会让接替她的人望尘莫及。

Wow, that's a perfect score by the Chinese gymnast – we said she would be a hard act to follow!
哇！这名中国体操运动员取得了完美的成绩。我们早就说过她是后无来者！

Thank you for taking over organising the family parties. Aunt Emma is a hard act to follow, but you've managed it!
谢谢你接手组织家庭聚会。要做到像艾玛姨妈那么好可是很难的，但是你做到了，毫不逊色！