| 1. | Black storm clouds were low and heavy over the gulf .
黑压压的积雨云低垂在墨西哥湾上空。 |
| 2. | It was almost black, dotted with ugly leaden rain clouds .
天上几乎已是一片乌黑，布满了一团团怕人的浓浓的积雨云。 |
| 3. | How much does the water in a cumulus cloud weigh
一朵积雨云所含的水有多重呢？ |
| 4. | Cumulonimbus clouds - their development and dissipation
积雨云-它的发展及消散 |
| 5. | Confirm cumulonimbus on the near path . over .
确认附近航线间的积雨云。完毕。 |
| 6. | Cumulonimbus confirm . barometric no hazard
积雨云已确认。气压没有问题。 |
| 7. | The cumulonimbus formations about which you speak . .
你说的这种积雨云. . |
| 8. | Type of low clouds : cu , cb , sc , st
-低云云属：积云，积雨云，层积云，层云 |
| 9. | The cumuionimbus formations about which you speak . .
你说的这种积雨云. . |
| 10. | Most thunderstorms form in cumulonimbus cloud
大多数雷暴由积雨云组成。 |
