She falls from the lowermost stair, and is swallowed up in the gulf.

她从最底层的楼梯上掉下来， 被吞没在深渊中。

On May 30, in sight of Land's End, it passed between the lowermost tip of England and the Scilly Islands, which it left behind to starboard.

5月30日，在船右舷，我们望见了英格兰岛极端和索尔林格岛之间的终极岛。

Finally, after two hours of walking, we reached a depth of about 300 meters, in other words, the lowermost limit at which coral can begin to form.

走了两个钟头，我们到了t9百米深的地方，那地方就是珊瑚在上面开始形成的最后边界。