1.
Stratification of rocks into beds.
层理岩石层理形成地层
2.
insulating layer
绝缘层隔热层防湿层
3.
layer,(eg of coal,between layers of other materials,eg rock,clay)
（夹层中的） 层（如石层、黏土层之间的煤层）;矿层.
4.
superincumbent bed
【地质】复层, 叠层
5.
the renal cortex, ie the outer layer of the kidney
肾皮层（肾的表层）.
6.
pricking up
抹灰底层, 括糙层
7.
A story in a house.
一层楼房房屋内的一层
8.
a man with rolls of fat around his stomach
腹部有层层肥肉的男子.
9.
delamination of concrete cover
混凝土保护层层状剥落
10.
This region is called exosphere.
这层大气称为外逸层。
11.
countercurrent chromatography
反流层析，逆流层析
12.
the top deck of a double-decker bus
双层公共汽车的顶层.
13.
There is ice on top of the river.
河的顶层结了一层冰。
14.
The lime-stone rocks bed up against the coal.
石为岩层紧靠着煤矿层。
15.
This social stratum is unstable;
这个阶层是动摇的阶层；
16.
the top deck of double - deck bus [ train ]
双层汽[火]车的上层
17.
Shale underlies coal.
页岩层在煤层之下。
18.
An external layer, such as bark or rind.
外层外层，如树皮或果皮