feet of clay致命的弱點。feet of clay是指不為人知的弱點或缺點，典故出自《聖經》。當一座雕像全身都由金、銀和鐵鑄成，但腳卻是黏土做的，這裡當然就是全身最脆弱的地方。這個習語可以寫成clay feet，但還是以此處的feet of clay較為常見。
看看老外聊天時怎麼用feet of clay：
Sara: Hey, are you listening to me? I'm talking to you!
Robert: I'm so sorry. I think I was distracted.
Sara: What distracted you? There's no one else here.
Robert: That's my feet of clay. I can't focus for too long.
Sara: You can train yourself. If possible, do one thing at a time.
薩拉：嘿，你在聽嗎？我在跟你說話！
羅伯特：抱歉，我剛剛分心了。
t：有什麼好分心的？這裡又沒有別人。
羅伯特：這是我的弱點，我無法專心太久。
拉：你可以訓練自己，可以的話，一次只做一件事情。
feet of clay例句精選：
From American history we learned that many presidents had feet of clay.
學了美國歷史，我們得知很多總統都有性格上的缺陷和弱點。
The president had feet of clay: he drank a lot.
總裁有個致命的弱點：他好喝酒。
I believed him to be honest but his actions showed that he had feet of clay.
我原以為他是個誠實的人，然而他的舉動卻顯示出他有不為人知的缺點。
Eric is sad because his idol has feet of clay.
埃裡克心裡很難受，因為他崇拜的偶像竟是泥足巨人。
拓展學習：
vulnerable 有弱點的
flaw 缺點
spotless 無瑕疵的
conceal 隱瞞
Achilles"heel 致命要害
dig the dirt 揭人傷疤
have one's number 握有某人的把柄