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