刀不磨要生锈，人不学要落后
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定義
- 1. a blade will get rusty if it is not sharpened; a man will fall behind if he doesn't study (idiom)
刀不磨要生锈，人不学要落后 の構成語
no; not so
person; people
knife
empress
to learn
to be born
to rust
to rub
grindstone
to leave out
colloquial reading for 落[luò] in certain compounds
to fall or drop
to fall behind
(bound form) to demand; to coerce
to want; to need; to ask for
to corrode