The mother goes mad every time she washes the T-shirt where her son wipes his dirty hands.

他妈妈每次洗儿子用来擦脏手的t恤时都很生气。

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But both characters are scientific idealists who don't care to dirty their hands with money.

ECONOMIST: Science in fiction is not science fiction

They don't get their hands dirty selling crack, cocaine or heroin on street corners or driving the lorries bringing in illegal immigrants.

BBC: Handcuffs

She wasn't afraid to get her hands dirty.

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