If the Universe had just a little bit more mass and energy, space would have curved one way.

如果宇宙有多一点点的质量和能量，空间就会向一个方向弯曲。

And if it had just a little bit less mass and energy, space would have curved the other way.

如果宇宙少一点点的质量和能量，空间就会朝着另一个方向弯曲。

Dark matter is that mysterious stuff that apparently accounts for some quarter of the mass and energy in the universe.

暗物质是一种占宇宙构成近四分之一的神秘物质。

As an astrophysicist, he studies the interactions of mass and energy within the cosmos.

作为一名天体物理学家， 他研究宇宙中质量和能量的相互作用。

But when one gets away, and all that mass and energy is headed towards Earth, that's when the astronomers start to worry.

但当有一个跑出来，所有的物质和能量奔向地球时，那时就是天文学家感到忧虑的时候了。

But even though those numbers of nucleons add up, remember: Mass and energy are equivalent.

但即便核中的数字被加总了，还是要记得：质能守恒。

Even today some people blame Einstein for the atom bomb because he discovered the relationship between mass and energy.

即使在今天， 仍有人将原子弹归咎于爱因斯坦， 因为他发现了质量与能量之间的关系。

So everything that you can see and feel and touch and smell, that's five percent of the universe's mass and energy.

所以你能看到、感觉到、触摸到和闻到的一切，都占宇宙质量和能量的百分之五。

And the lesson of general relativity is that neither space nor time are independent of the masses and the things, the mass and energy that live in our universe.

广义相对论告诉我们，空间和时间都不能独立于宇宙中的质量、物质和能量。

This ingenious little equation relates mass and energy by a simple proportionality constant, and thanks to Einstein we know that constant is the square of the speed of light, or c2.

这个巧妙的小方程通过一个简单的比例常数将质量和能量联系起来，感谢爱因斯坦， 我们知道该常数是光速的平方， 或 c2。

Because Einstein's equations tell us that mass and energy are equivalent, the quantum fluctuations in every cubic meter of space have an energy that corresponds to a mass of about four protons.

因为爱因斯坦方程式告诉我们质量和能量是等价的，所以每立方米空间中的量子涨落所具有的能量对应于大约四个质子的质量。

Then in the 70s a theory of black hole  thermodynamics was developed which describes the links between black hole mass and energy, how the  surface area of a black hole relates it s entropy, and how the surface gravity  relates to temperature.

随后在 70 年代，黑洞热力学理论被发展起来，它描述了黑洞质量和能量之间的联系、黑洞表面积与其熵的关系，以及表面引力与温度的关系。