| 单词 | under the knife | 
| 释义 | under the knifephraseSee full dictionary entry for  knife If you go under the knife, you have an operation in a hospital.  Kelly was about to go under the knife when her surgeon stopped everything. under the knife in British Englishundergoing a surgical operation under the knife in American English  US   Informal   undergoing surgery Examples of 'under the knife' in a sentence | 
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