It could kill us because it's using up all the chemical energy on earth and we contain some chemical potential energy.

它把我们杀光是因为它要用完地球上的所有化学能量了，而我们体内蕴含着一些潜在的化学能量。

The amazing thing about your complicated, self-healing, blood-guzzling muscle tissues is that they turn chemical potential energy into mechanical energy, or movement, simply by doing two things — contracting and relaxing.

你复杂的，自愈的，耗血的肌肉组织的神奇之处在于它们将化学势能转化为机械能，或运动，仅仅通过做两件事情——收缩和放松。

Each possesses its own density of chemical potential energy, or caloric value, like for example, 1 gram of carbohydrate contains about 4 calories, while a gram of fat contains about 9 calories.

每一种都有自己的化学势能密度或卡路里值，例如，一克碳水化合物含有大约 4 卡路里，而一克脂肪含有大约 9 卡路里。