Spelling is my Achilles' heel.

我最伤脑筋的弱点是拼写出错。

《新英汉大辞典》

But drones do have an Achilles' heel.

但无人机也有其阿喀琉斯之蹱。

youdao

Every villain has his Achilles' heel.

每个反派角色都有它的致命弱点。

youdao

He says their research has identified an "Achilles' heel" of the parasite - an enzyme that is needed for the parasite's survival.

VOA: standard.2010.04.05

But Achilles, of course, he got him in the heel where he didn't have any armor.

但阿喀琉斯,是脚踵中箭,他也是没有穿盔甲的

耶鲁公开课 - 古希腊历史简介课程节选

For all Genzyme's stability, its gene therapy research might represent a kind of Achilles' heel.

FORBES: Genzyme Takes Gamble On Gene Therapy

The Players' Achilles' heel, however, is that it is still essentially a PGA Tour tournament.

WSJ: Players Championship: The Major That Isn't Yet Major

Every couple has its Achilles' heel, that pressure-cooker situation that brings out the worst in two people.

WSJ: Why Spouses Fight When Buying a House