Sales have quintupled over the past few years.
过去几年中销售量较原来的增加了四倍。
《牛津高阶英汉双解词典》
The population of China quintupled.
中国的人口是原来的五倍.
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Closer to the poles , humans have quintupled the amount of material floating on the ocean surface.
接近地极处的海平面人类废弃物的量达到了有五倍之多.
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