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- 这个理论叫做用进废退The Principle of Use and Disuse
- 用进废退说use and disuse theory
- 常用in common usage
- 进advance
- 退retreat
- 他把它扔进废纸篓里。He slung it into the wastepaper basket.
- 不用need not
- 废abolish
- 家用home-use
- 她把面包屑扫进废纸篓里。She swept the crumbs into the wastebasket.
- 缩进indent
- 没用useless
- 走进step in
- 退房check out
- 废纸篓wastebasket
- 不用谢You're welcome
- 请进walk up
- 退钱moneyback
- 用来be used for