So, you can get the mass of a flat object with density.

因此，可以通过密度求一个平面物体的质量。

youdao

We knew the density of steel, and so you can figure out the mass, just take my word for it.

我们知道铁的密度，所以你能算出质量，相信我说的。

youdao

Strength training has been proven to increase bone density, increase lean muscle mass, improve posture, and reduce the risk of injury.

已证实，力量训练能增大骨质密度，增加瘦肌体积，改善姿势，减少损伤的风险。

youdao

But accurately working out Mathilde's volume (necessary because density is the ratio of mass to volume) was harder.

ECONOMIST: Asteroids

He studies the material properties of tissue and organs from animals and cadavers to assign shape, size, density, mass and ten or more coefficients that describe how each cube of virtual flesh will deform when confronted with a given force from a given direction.

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The American city of the future is going to look a little bit more like the American city of the past, more closely centered on a high density downtown with mass transit increasingly used to get workers in and out.

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