第二是定比定律。

The second was the law of definite proportions.

youdao

定比定律是说一个纯净物中每种元素的质量比是一定的。

The law of definite proportion states that different samples of a pure chemical substance always contain the same proportion of elements by mass.

youdao

定比定律是说一个纯净物中每种元素的质量比是一定的。

The law of definite proportion states that different samples of a pure chemical substance always contain the same proportion of elements by mass.

youdao