back ·phrase (IDIOM)
Definition: If criticisms, insults, etc. are like water off a duck's back to you, they do not affect you at all. Level: C2
她尖刻的言语对他来说毫无影响。
Her harsh words just ___are ___like ___water ___off ___a ___duck's ___back to him.
你提出任何批评，她都毫不在乎。
Whatever criticism you offer is like ___water ___off ___a ___duck's ___back to her.
尽管收到了负面反馈，他的信心丝毫未受影响。
Despite the negative feedback, his confidence was ___like ___water ___off ___a ___duck's ___back.