The two categories of paper differ in weight, serviceability, and quality standards.

纸的两类不同的重量，功能和质量标准。

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But it may explain how people with apparently similar lifestyles differ in propensity to put on weight.

但是它可能解释相同生活方式的人们却有不同的增加体重的倾向。

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Atoms of the same element that differ in their atomic weight are called isotopes.

具有不同原子量的同一种元素被称为同位素。

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Now, in the case of weight and cardiovascular disease, the lines depicting men and women don't differ very much but here they do.

在刚才的体重与心血管疾病的关系研究中,性别差异并不明显,但是在这里却有明显的性别差异

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

AIDS. The likelihood that a mutant protein can slip through unnoticed is small: the spectrometer can tell apart proteins that differ by less than a tenth of a proton mass in weight.

ECONOMIST: Viruses: Hunt the mutant | The