| 1. | Another negative feature of hydrogen is that it is hazardous material .
氢气的另一个缺点是：氢是一种易爆的物质。 |
| 2. | The free alkali metals react immediately with water to liberate hydrogen .
游离的碱金属直接和水中作用，放出氢气。 |
| 3. | Fire will take place if the gases hydrogen and oxygen are mixed and ignited .
如果将氢气和氧气混合并点燃，就会着火。 |
| 4. | The hydrogen in the gauge is ionized by electron emission from a heated cathode .
在离子计内的氢气是用一个加热阴极放射电子来电离的。 |
| 5. | The two pipes for the introduction of the hydrogen were fixed at the lower end of each balloon .
在每一个气球的下部都装上了两根输送氢气的管子。 |
| 6. | Coal-gas, obtained from the distillation of coal is mainly a mixture of hydrogen and methane .
煤经蒸馏以后所得到的煤气主要是氢气和甲烷的混合物。 |
| 7. | The permeation constant of gases through metals is negligible except for hydrogen through palladium or iron .
除了氢气能穿过钯和铁之外，气体穿过金属的透气常数是可以略而不计的。 |
| 8. | If bubbles of hydrogen gas adhere to the cathode surface, plating is prevented around the bubble and a pit in the coating results .
如果氢气泡粘附到阴极表面上，气泡周围的镀覆就会停止，于是形成一个麻点。 |
| 9. | The present study of separation technique of hydrogen gas
氢气分离技术的研究现状 |
| 10. | Research on the application of purified hydrogen
脱氧催化剂纯化氢气的应用研究 |
