空着不用的房间常常积起大量灰尘。
不用说，空着肚子劳动是很难的。
Needless to say, it's difficult to do manual labor on an empty stomach.
不用说，空着肚子劳动是很难的。
不用说，空着肚子劳动是很难的。
Needless to say, it's difficult to work without eat anything.
不用说，空着肚子劳动是很难的。
Needless to say it is difficult to do work when you are hungry.
不用说，空着肚子劳动是很难的。
Needless to say, it's hard to do some work without any food.
不用说，空着肚子劳动是很难的。
Needless to say, it's hard to do some work without any food.
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