| 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 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。 |
| 3. | Research on the application of purified hydrogen
脱氧催化剂纯化氢气的应用研究 |
| 4. | Hydrogen provided more lift than helium
氢气的上升性能优于氦气。 |
| 5. | The exhibit also explains the production , delivery , and storage of hydrogen and its application as clean energy
此外亦会介绍氢气的制造、输送、储存及其应用的过程。 |
| 6. | Helium is also lighter than air , but it costs a lot of money . so balloons were ( and are ) usually filled with hydrogen
氦也是一种比空气轻的气体，但是它太昂贵，因此气球通常都是装满氢气的。 |
| 7. | Hydrogen could be derived from coal - fired electricity , which is the cheapest source of energy in most parts of the country
燃煤发电是全美多数地区最廉价的能源，也可做为制造氢气的电力来源。 |
| 8. | When approaching a hydrogen leak , hold some readily combustible material such as a rolled up newspaper or a straw broom in front of you
处理氢气的泄漏时，手持易燃的物质伸向前方，例如，报纸或草扫帚。 |
| 9. | But now , researchers at general motors have developed a catalytic converter that generates hydrogen directly from gasoline
现在，通用汽车公司的科学家已经成功研发出一种能直接从汽油里提取氢气的催化转化剂。 |
| 10. | Momoda admits , however , that the hydrogen pickup rate is still too slow ; current materials might take 30 minutes to refuel
不过莫默达也承认，释放氢气的速率还是太慢了，以目前的材料而言，要补充燃料还得花上30分钟。 |
