学校里禁止乱扔垃圾。
Littering is prohibited in the school.
问题是,我们又不能像在地面上一样在太空里竖起一个“禁止乱扔垃圾”的牌子,那我们要怎么清理这些垃圾呢?
But it's not like you can just prop a 'no space littering' sign out there, so how are we going to clean this up?
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禁止
prohibit; bar; ban; forbid; disallow; veto; outlaw; interdict; enjoin; preclude; inhibit; suppress; proscribe; prohibitive; forbidden; prohibitory; prohibition; interdiction; proscription; against
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乱扔垃圾
litter; throw litter about; drop litter carelessly