- dead mouth (指马)
- 嚼: masticate; chew
- 口: mouth
- 过硬: have a perfect mastery of st ...
- 过硬: have a perfect mastery of sth.; be really up to the mark; be able to pass the stiffest test 过硬本领 be perfect at a skill; 过硬操作技术 a perfect mastery of operational technique
- 过硬的: overhard; superhard
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