Another way of countering drought is to have a limited amount of mass above ground and to have extensive root networks below ground.

对付干旱的另一种方法是在地面上种植特定数量的植物，并且确保地下有广大的根系网络。

youdao

It has a solid amount of mass to it, but isn't so heavy that you will get tired of holding it upright while watching a movie or recording one.

它包括很多硬件，但是并不是特别重；竖直拿着它来看电影或记录时不会感到累。

youdao

He decided that the strength of the force keeping a planet in orbit around the sun depended on two things. One was the amount of mass in the planet and the sun. The other was how far apart they were.

他认为，让一颗行星在其轨道上环绕太阳运转的力量源于两种东西，一是行星和太阳的质量，二是他们之间的距离。

youdao

I mean that's obvious. The mass, if you double the amount of stuff the mass will double.

这是显然的，还有质量，如果你把系统中物质的,数量增加一倍，质量也会增加一倍。

麻省理工公开课 - 热力学与动力学课程节选

You hook one end of the spring to a wall and you pull it from rest by some amount and you attach the one kilogram mass to it.

你把弹簧的一端固定在墙上,然后拉伸一段距离,接着你把 1 千克物体固定在上面

耶鲁公开课 - 基础物理课程节选

Then, I bring the elephant and I pull the spring by the same amount and I find the acceleration of the elephant and the denominator is obviously the mass of the elephant.

然后我再找来大象,用相同的力去拉弹簧,大象就具有了加速度,很明显,分母就是大象的质量

耶鲁公开课 - 基础物理课程节选

Even Barely Political received a decent amount of mass media coverage on its way to 1 billion.

FORBES: Mondo Interview: Happy Tree Friends Join Eminem, RWJ In YouTube's Billion Views Club

Mr. RIGDEN: A small amount of mass produces enough energy, because of that C squared, to destroy a city.

NPR: E=mc? at 100

So a very small amount of mass may be converted into a very large amount of energy and vice versa.

NPR: E=mc? at 100