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| fallout The descent of airborne solid or liquid particles to the ground, which occurs when the speed at which they fall due to gravity exceeds that of any upward motion of the air surrounding them (空气中的固体或液体颗粒下降到地面，由重力引起的向下速度超过周围空气的向上运动产生。) | |||
| 坠尘: 3 phrases in 2 subjects |
| General | 1 |
| Technology | 2 |