 |
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| هيدروجين (易燃、无色的气体，且是最轻和宇宙中含量最丰富的元素，它主要存在于水和大部分的有机化合物中，且被使用于制造氨和其他化学物质、油和脂的氢化，和焊接中。) | |||
| 氢: 109 phrases in 16 subjects |
| Accumulators | 1 |
| Agriculture | 10 |
| Biochemistry | 4 |
| Chemistry | 8 |
| Environment | 10 |
| Fishery fishing industry | 1 |
| Food industry | 34 |
| Food service and catering | 16 |
| Isolation | 2 |
| Laboratory equipment | 2 |
| Soil science | 1 |
| Thermal Energy | 1 |
| Toxicology | 1 |
| United Nations | 14 |
| Veterinary medicine | 3 |
| Water supply | 1 |