Food is the amazing fuel that keeps these machines running.

食物是维持这些机器运转的神奇燃料。

So if you think about a machine, when a machine runs for a long time it gets worn out.

因此，如果您考虑一台机器，当一台机器长时间运行时它会磨损。

Multicellular organisms, then larger animals, could now evolve thanks to this new element, essential for keeping these increasingly complex biological machines running.

多亏了这个新元素，多细胞生物和更大的动物才得以进化，这个元素对维持这些日益复杂的生物机器运转至关重要。

There are only two people working out, and you decide to go for a run, and there are six running machines or treadmills.

只有两个人在锻炼， 你决定去跑步，有六台跑步机或跑步机。

Tesla's innovation, the genius of it, was his invention of ways to generate alternating current, and alternating current turned out to be very good for making machines run.

特斯拉的创新，它的天才，是他发明了产生交流电的方法，而交流电被证明非常适合让机器运转。