- in one's place
- 用: 40分鐘跑完全程 run the course in 4 ...
- 不用: need not
- 備而不用: have sth. ready just in case; be better to get ready for nothing than caught unprepared; have a thing but not to use it for the time being; keep a thing seven years and you will find a use for it.; keep sth. for possible future use; put aside for possible use in the future
- 擯而不用: reject
- 廢而不用: come [fall; pass] into disuse; fall [sink] into oblivion; stop using
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