Presently we steamed into a great bay, in the narrow mouth of which lay an island.

不久，我们驶入了一个大海湾， 在狭窄的河口处有一座小岛。

Beneath its narrow mouth, the walls of the cenote open up to become a giant dome.

在它狭窄的嘴巴下，天然井的墙壁张开，变成了一个巨大的圆顶。

The narrow mouth of the bay - easy to defend, yet deep enough for big ships - defines an ideal and strategic natural harbor.

狭窄的海湾入口 - 易于防御，但足够深，可以容纳大型船只 - 定义了一个理想的战略天然港口。

He no longer hesitated to be led to a spot which promised such unalloyed gratification to his wearied senses; and leaning on the arm of his companion, he entered the narrow mouth of the cave.

他不再犹豫地被带到一个可以让他疲惫的感官得到如此纯粹的满足的地方。他扶着同伴的胳膊，进入了狭窄的洞口。