To starboard, a prominent bulge on the sea bottom caught my attention.

右舷呢，海底上有一大堆东西引起了我的注意。

So it is a comparatively simple step from locating the sea bottom to locating a shoal of fish.

从测定海深到测定鱼群，这一进展比较容易。

All in all, it's estimated that if the sea bottom were made level, its average depth would be about seven kilometers.

总起来说，照一般的估计，如果把海底平均起来，它的平均深度可能是七千米左右.

For now, the San Jose remains at the sea bottom.

目前，圣何塞号仍在海底。

Seaweed is found throughout the world and can be either free-floating, such  as sargassum, or attached to the sea bottom as in kelp.

海藻遍布世界各地， 可以是自由漂浮的，如马尾藻，也可以是附着在海底的， 如海带。

I heard the pick ringing on the limestone soil, its iron tip sometimes giving off sparks when it hit a stray piece of flint on the sea bottom.

我听到石灰质的地上铁锨叮叮作响，铁锨有时碰到丢在水底下的火石，发出星星的火光。

Till he almost felt himself to be voyaging bodily through its wild scenes, standing on its hollow hills, traversing its deserts, descending its vales and old sea bottoms, or mounting to the edges of its craters.

他一直望着，仿佛觉得自己好像是亲身在那荒野境地旅行，驻足空山，穿过荒漠，走下谷地和古老的海底，登上火山口的边缘。