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| NOUN |
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| /naɪf/ |
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| | an object with a sharp blade for cutting food 餐刀 | You need a sharp knife for the steak. 你需要一把锋利的刀来切牛排。 | | knives and forks 刀叉 | | a kitchen/bread/carving knife 厨房用刀/切面包刀/切肉刀 | | | a | an object with a blade , used as a weapon or tool 刀子；匕首；刀具 | | | | b | a doctor’ s scalpel 解剖刀；手术刀 | | |
| PHRASES |
| - | the knives are out informal
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| used for saying that people are being very unfriendly or deliberately causing problems |
| 剑拔弩张；寻衅滋事；挑衅 |
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| - | like a (hot) knife through butter
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| very quickly or easily |
| 迅速地；轻而易举地 |
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| - | put/stick the knife in informal
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| to criticize someone very strongly , especially when they are already weak |
| （尤指在对方已经很弱时）抨击 |
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| - | twist/turn the knife (in the wound)
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| to make a bad situation even worse |
| 雪上加霜 |
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| - | under the knife informal
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| used for saying that someone is having a medical operation |
| 正在接受手术 |
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| - | you could cut the air/atmosphere with a knife
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| used for saying that a situation was difficult or embarrassing , because people were very angry or upset |
| 气氛紧张得都快凝固了；局势很僵 |
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