不清洁的汽油会损害汽车发动机。

Dirty oil can hurt a car's engine.

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他们用并不清洁的塑料袋带走剩饭，然后与家人分享。

They put the food in dirty plastic bags and share with family.

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这个地区疾病的主要原因是水不清洁。

A major cause of the disease in this area is unclean water.

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这玻璃杯中的水不清洁。

The water in this glass is not clean.

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这玻璃杯中的水不清洁。

The water in this glass is not clean.

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