沙层的英文：
sand bed

sand是什么意思：
n. 沙；沙滩
v. 用砂纸磨光；撒沙于；被沙堵塞

They panned off the sand and dirt.
他们用淘金盘淘去砂泥。

Sift gold from sand.
沙里掏金。

Sand castle damages easily.
沙堡容易受到损坏。

spit (sand spit)
沙嘴

Many sands will sink a ship
积沙沉船

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。