The bigger the animal is, the lower its surface-to-volume ratio; for every ounce of body mass, there is proportionately less surface through which heat can escape.
动物体型越大，其体表体积比越低；躯体每增加一盎司的重量，所能散发热量的表面就成比例减少。
If a large enough mass or energy is crammed into a small enough space that warping becomes so severe that nothing not even light can escape.
如果把巨大的质量或能量压缩到足够小的空间，那么扭曲就会非常严重，以至没有任何东西，包括光在内，能够逃脱它的引力。
Deuterium is a heavier form of hydrogen that is common in Earth's oceans and that would have too much mass to escape Venus' atmosphere.
氘是氢的同位素，在地球上的海洋中广泛存在，其质量较重，很难逃离金星大气。
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