Unlike a battery, a fuel cell does create exhaust. But that exhaust is simply the reaction product of hydrogen and oxygen, namely water.

和电池不用，燃料电池确实会产生废气。但这种废气只是氢和氧的反应产物，即水。

Ignition sequence start The power released emerges as kinetic energy of the reaction products, with 80% ending up in the neutron.

点火顺序开始 释放的能量以反应产物的动能形式出现，其中 80% 以中子形式结束。