| 1. | It can be used on rotating machinery and under water .
它可以用于回转式机器，也可以在水下应用。 |
| 2. | Underwater there is no air for a combustion engine to consume .
在水下根本没有空气可以供内燃机使用。 |
| 3. | If a wire was laid under water, the current would all leak away .
导线如果放在水下，电流就会全部漏掉。 |
| 4. | The faster it moved underwater, the quicker the batteries would go flat .
它在水下开得越快，蓄电池的电消耗得也越快。 |
| 5. | With a snorkel, however, a diver can stay under water for quite a long time .
可是，潜水员携带一根通气管就可以在水下呆很长时间。 |
| 6. | In trawl fishing, huge nets are slowly pulled below the water to collect fish .
拖网捕鱼时，巨大的网被缓缓地在水下拉过以捕捉鱼群。 |
| 7. | For underwater bursts at certain depths, the radioactive cloud may not be formed .
当在水下某一深度爆炸时，放射性云团也许不会形成。 |
| 8. | It helps the diver to see clearly under water because it has glass or plastic "windows "
它能帮助潜水员在水下看得清楚，因为它有玻璃或塑料“眼镜”。 |
| 9. | In the course of its rapid expansion, the hot gas bubble, while still under water, initiates a shock wave .
在热气泡迅速膨胀过程中，（它仍然在水下），它引起了冲击波。 |
| 10. | If it is necessary to have the joints under water, they must be bedded into a box or sleeve which absolutely prevents water from penetrating in .
如果有必要在水下接头，就必须把它们安置于绝对不渗水的密封盒子或套管中。 |
