Satellite images suggest some outlying islands have been completely submerged by seawater.

卫星图像显示，一些离岛已经完全被海水淹没。

Look at the many outlying islands round a continent, and see how many of their inhabitants can be raised only to the rank of doubtful species.

看看一个大陆周围的许多离岛， 看看有多少居民只能被提升到可疑物种的等级。