hydrogen scale

例句：

1. 1. The process of electrolysis is crucial in the production of hydrogen gas.
   电解过程在生产氢气中至关重要。
2. 2.The hydrogen gas produced by this method has a higher purity and lower cost than traditional methods.
   这种方法产生的氢气纯度更高，成本更低。
3. 3.Hydrogen gas is often used as an alternative fuel for transportation and power generation.
   氢气常被用作运输和发电的替代燃料。