hydrome

例句：

1. 1. Hydrogenis the simplest element in the periodic table.
   氢是周期表中最简单的元素。
2. 2. Thereaction between water and oxygen produces hydrogen gas.
   水和氧气的反应产生氢气。
3. 3. Hydrogen is essential for life as it isa component of many biological molecules.
   氢对生命至关重要，因为它是许多生物分子的组成部分。