高达750摄氏度的火山熔岩伴随雷鸣般的咆哮声从山顶倾流而下，山口火舌吐出的火山灰高达四公里。
Searing 750-degree (Celsius) gas flowed down the mountainside in a thunderous roar, and deadly plumes spewed ash four kilometers above the crater.
酷热的非洲，几乎没有适于航海的河流，这些河流从内陆高原到海岸平原一路穿瀑布、过险滩，倾流而下。
Few of tropical Africa's rivers are navigable from the ocean, dropping as they do from interior tableland to coastal plains by a series of falls and rapids.
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