By the 7th of August our successive descents had brought us to a depth of thirty leagues; that is, that for a space of thirty leagues there were over our heads solid beds of rock, ocean, continents, and towns.

到 8 月 7 日， 我们连续下降， 已经到达了三十里格的深度。也就是说，在我们头顶三十里格的空间里，有坚硬的岩石、海洋、大陆和城镇。