1.waste还可作“荒地”解,指没有开垦或没有耕种的土地,作此解时是可数名词,可用于复数形式。
2.waste后可接of短语作其定语。
3.waste用作名词的用法例句：
The city waste is disposed of in the sea.城市垃圾倒在海里处理掉。
The safe disposal of nuclear waste is a major problem.安全处置核废料是个大问题。
It's only a waste of time to speak to her.和她说话纯粹是浪费时间。