| 短语 | a rotten（或bad）apple |
| 释义 | a rotten（或bad）apple informal a bad or corrupt person in a group, especially one whose behaviour is likely to have a detrimental influence on their associates 〈非正式〉害群之马; 败类。 [ORIGIN: with reference to the effect that a rotten apple has on fruit with which it is in contact.] |
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