Yesterday Mrs. Morrison had given the flat an extra clean.

昨天，莫里森太太把这套公寓房间额外打扫了一遍。

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These supplies include food, medicine,clean water, and extra power supplies.

VOA: special.2010.01.05

... A 'green power' program regularly invites customers to pay $4 to $10 extra per month to switch to clean energy.

VOA: standard.2010.03.23

By the lights of M Jewell LLC, the court had no right to give Mr. Powell an extra thirty days to clean things up.

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Renewables are worth their extra costs because they are clean.

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The drawback of using plasma technology to clean exhausts has always been the extra power required to run the system.

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