1. Suddenly they came to a waterfall which droped into an underground lake at the bottom of the cave.
    他们突然遇见一条瀑布，它直泻入洞底的地下湖里。

2. 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。

3. Suddenly they came to a waterfall which dropped into an underground lake at the bottom of the cave.
    突然，他们来到一道瀑布前，那瀑布奔泻而下，注入洞底一处地下湖里。

4. That a series of deep soundings was obtained in the Atlantic and the first samples were collected by dredging the bottom.
    才在大西洋测得一个海水深度，同时通过挖掘海底，取得了研究海底的首批样品。

5. It spins like a top with a stick poked through from top to bottom.
    它转动起来好似从上到下插过一根棍子的陀螺。

6. I was twenty days hacking and hewing at it at the bottom.
    砍断它的根部用了二十天。

7. I found myself suspended in the middle of the air — held up by a 130-kilometer-an-hour blast of wind coming from an industrial-strength fan in the bottom of the tower.
    我发现自己悬在了空中--高塔底部一架工业用强力风扇吹出时速达130公里的风柱将我拖起。

8. For nearly three and a half centuries she lay at the bottom of Stockholm harbour until her discovery in 1956.
    这艘大船在斯德哥尔摩港口的海底躺了将近几年来个世纪之后，直到1956年才被发现。

9. Frank gently lifted the crockery out of the box and suddenly noticed a miniature painting at the bottom of the packing case.
    弗兰克轻轻地把陶器拿出箱子，突然发现在箱底有一幅微型画，