[医] 方角剑水蚤

Some believe that massive underwater landslides or earthquakes can violently release gas from a substance called methane hydrate trapped beneath the sea bed. As its escaping bubbles rise, they lower the density of the surrounding ocean. The ship drop

发表于:2019-01-22 / 阅读(81) / 评论(0) 分类 自然百科2010年