Jakarta's water problems start with poor infrastructure that allows human waste and rubbish to contaminate supplies that travel roughly 80 kilometers from the hills where Jakarta's main reservoir is located.

VOA: standard.2010.08.04

You might believe for instance, that women should not prepare food when menstruating because it would contaminate the food.

例如，你可能会认为，女人来月经时不应该做饭,因为这样会亵渎了食物。

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