compared to 做什么成分

Specific gravity is the ratio of density of a substance compared to the density of fresh water at 4°C (39°F)之中，compared to 做什么成分？

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陈才 - 英语教师 2022-08-23 07:39

擅长：中考英语,词法问题

Specific gravity is the ratio of density of a substance compared to the density of fresh water at 4°C (39°F)

参考译文：比重是某物质的密度与水的密度之比。

解答： compared to the density of fresh water at 4°C (39°F)为过去分词作定语。相当于是which is compared to the density of fresh water at 4°C (39°F)