The collapse and avalanche of the lava dome sent an ash plume 2000 ft over the western rim of the crater; the ash plume then rapidly dissipated.
The resulting collapse and avalanche sent an ash plume 2,000 feet (610 m) over the crater, although it quickly disappeared.
The resulting collapse and avalanche sent an ash plume 2,000 feet (610 m) over the crater, although it quickly disappeared.
为该句子写一个更简单的版本: The collapse and avalanche of the lava dome sent an ash plume 2000 ft over the western rim of the crater; the ash plume then rapidly dissipated. 输出: