| 单词 | water off a duck's back |
| 释义 | water off a duck's back water off a duck's back ► C2 criticisms of or warnings to a particular person that have no effect on that person: » I've told him that he's heading for trouble, but he doesn't listen - it's just water off a duck's back.Thesaurus+: ↑Useless and futile |
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