河底的英文：
bed

参考例句：

The policemen are dragging the river for the body of the missing boy.
警察在河底用拖网打捞失踪男孩的尸体。

As the sampler is dragged along the bed, it collects a sample from the top layer of bed material
取样器沿河底拖动，收取表层河床质。

We shall have to dig under the river/through the mountain/into the hill to lay this pipe.
我们得挖入河底;挖穿山;挖入山中好埋设这个管子。

Touching there the bedrock of reality, the bottom of his Forsyte's spirit, Soames rested for a moment
这样探到现实的河底，也就是福尔赛精神的底蕴，索米斯的脑子就休息一下。

bed是什么意思：
n. 床，睡眠处；睡觉；（海、河、湖等的）底部；苗床
v. 把...安置在；为…提供住宿（床位）；睡，卧

Procrustean bed
逼人就范之物

Bed rest is more like bed agony.
上床睡觉好象是种苦恼。

It has bedded into the deepest crevices of the store.
它已钻进了店里最隐避的隙缝。

change a bed;change the baby.
换床单；给婴儿换尿布

She is in bed with an awful cold.
她得了重感冒而卧病在床。