The weight mass ratio of fragrant masterbatch should be controlled about 5%.

生产中一般控制芳香母粒质量分数5%左右。

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The production technologies of PVA with ultrahigh relative molecular weight mass and high stereo-tacticity were introduced.

介绍了超高相对分子质量和高立构规整度的PVA 制备方法；

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Sculptures must, for example, be stable, which requires an understanding of the properties of mass, weight distribution, and stress.

例如，雕塑必须是稳定的，这就需要理解质量、重量分布和压力的特性。

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Body mass index,or BMI, is a measure of a person's weight in relation to height.

VOA: special.2011.02.15

While there is advice aplenty on how to lose pounds or kilograms, a new study focuses on middle aged and older women who maintain normal body weight, or BMI (Body Mass Index) and do not diet.

VOA: standard.2010.03.30

On average they gain 32.6%, 40.9% and 46.8% additional dry weight mass, respectively, when grown in air containing an extra 300, 600, and 900 parts per million of CO2.

FORBES: Got Problems? Blame Global Warming

Weight and mass are not equivalent as weight can change with gravitational changes.

FORBES: Why Scientists and Journalists Don't Always Play Well Together

They measured height, weight and body mass index - calculated by dividing weight in kilograms by the square of your height in metres.

BBC: Curvier women 'will live longer'