H-block

例句：

1. 1. The hydrogen block is a crucial component of the battery.
   氢块是电池的关键组成部分。
2. 2. The hydrogen block reacts with oxygen to produce water and heat.
   氢块与氧气反应产生水和热。
3. 3.The hydrogen block is used in various applications, including fuel cells and hydrogen storage.
   氢块在各种应用中被使用，包括燃料电池和氢气存储。