Photons have no mass – they are weightless.
光子没有质量——它们是没有重量的。
I began sifting through the mass of evidence.
我开始认真筛选大量的证据。
The mass media tends to personalize politics.
大众传媒往往把政治个人化。
Their latest product is aimed at the mass market.
他们的最新产品瞄准了大众市场。
From this you can calculate the total mass in the Galaxy.
据此，你可以计算出银河系的总质量。
They now have access to the mass markets of China, Japan and the U.K.
他们现在有通路进入中国、日本和英国的大众市场了。
The UK, uniquely, has not had to face the problem of mass unemployment.
唯有英国无须面对大量失业的问题。
The size of the nebula at this stage is inversely proportional to its mass.
这个阶段的星云大小与其质量成反比。
The language of the article will have to be toned down for the mass-market.
这篇文章的措辞必须缓和一下以适合大众市场。
Astronomers know that Pluto and Triton have nearly the same size, mass, and density.
天文学家们知道冥王星和海王卫一拥有几乎相同的体积、质量和密度。
What can be done about mass unemployment?
如何应对大规模失业问题呢？
This can cause a kind of mass feeding frenzy.
这可能会导致一种大规模的疯狂进食。
There are no signs, yet, of any mass celebration.
目前还没有任何大规模庆祝活动的迹象。
It utilizes space, mass, texture, line, light, and color.
它利用了空间、质量、纹理、线条、光线和颜色。
This is the story of wildlife conservation in the age of mass extinction.
这是个关于在大规模的物种灭绝时代保护野生动物的故事。
This would mean that it had lost mass over the course of four billion years.
这意味着它在40亿年的时间里失去了质量。
A planet's ability to retain an atmosphere depends on its temperature and mass.
一颗行星保持大气的能力取决于它的温度和质量。
They strongly suggest that the neutrino has mass, albeit an infinitesimal amount.
他们强烈表明中微子是有质量的，尽管质量是无穷小的。
The city is an extraordinary processor of mass and energy and has its own metabolism.
城市是质量和能量的特殊处理器，有着自己的新陈代谢。
Under no circumstances should youngsters follow negative information on mass media blindly.
在任何情况下，青少年都不应盲目跟从大众媒体上的负面信息。
Many scientists have therefore concluded that a sixth great mass extinction is currently in progress.
因此，许多科学家得出结论，第六次大规模物种灭绝正在发生。
Shortly after the workers went on strike, police began to mass at the shipyard.
工人罢工后不久，警察开始在造船厂集结。
They threatened to lead a mass walk-out if the party did not sharply change direction.
他们威胁说，如果该党对其发展方向不作大的调整，他们就发动大家集体退党。
The parson went to the crowd, and declared that the mass had been said.
牧师走到人群中，宣布弥撒已经完成。
It was a time of mass unemployment.
当时有大批人失业。
There was mass hysteria when the band came on stage.
乐队登台时观众一片疯狂。
After the crash the car was a mass of twisted metal.
那辆车撞成了一堆扭曲的废铁。
Pope John Paul celebrated mass today in a city in central Poland.
约翰·保罗教皇今天在位于波兰中心的一个城市主持了弥撒。
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