Sales have quintupled over the past few years.

過去幾年中銷售量較原來的增加了四倍。

《牛津高階英漢雙解詞典》

The population of China quintupled.

中國的人口是原來的五倍.

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Closer to the poles , humans have quintupled the amount of material floating on the ocean surface.

接近地極處的海平面人類廢棄物的量達(dá)到了有五倍之多.

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