As a body shares more than 50% of the mass of a whole car, it is particularly important to reduce mass of body.

就整车质量而言，车身占其总质量的50%以上，因而减轻车身质量尤为重要。

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So, if you could make automobiles with a high magnesium content, you would reduce the mass, reduce the energy required, and thereby reduce the environmental impact.

所以，如果你能用含镁量,很高的材料来制造手机，你就能减轻手机的质量，减少制造所需能量，因此减轻了对环境的破坏。

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Inactivity, poor nutrition, and age-related changes, all help to reduce bone mass at the rate of approximately 1% per year after age 40.

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The architects turned the pier into a hexagon with faceted sides that catch the light and reduce the apparent visual mass.

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Dr Golomb and her team believe that antioxidant compounds, called catechins, can improve lean muscle mass and reduce weight - at least studies in rodents would suggest this might be so.

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