It's a good idea to carry plenty of spare change when you're traveling - some places even charge extra for toilet paper!

旅行时带够充足的零钱会是一个好主意。一些地方甚至会需要额外付费，才有卫生纸。

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He bought up all the spare building land in the district and can now charge what he wants for it.

他把这个地区的所有闲置的建筑土地全部买下了，现在他可以随心所欲地要价了。

youdao

Set up and maintain spare parts management system, control maintenance charge.

建立和维护零配件的管理系统，控制设施的维护费用。

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My ancient cell phone's gas gauge is similarly overoptimistic, and as its aging battery holds less charge than ever, the extra-big spare keeps me connected.

FORBES: Spare Batteries

The new under-occupancy charge will see a reduction in benefits for social housing tenants who have one or more spare bedrooms.

BBC: MP leads housing benefit changes rally in Middlesbrough