Rather than gradually slowing down, the expansion was proceeding as if it were being given an extra kick by space itself, by something that constitutes 75% of the mass-energy of the universe.
不是缓缓变慢，而是膨胀的进行像是被空间本身额外“踹”了一下，组成物质-能量宇宙75%的东西。
2
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。
3
To obtain empirical data regarding the energy costs of singing, Thomas examined the relationship between song rate and overnight changes in body mass of male nightingales.