您要查找的是不是：
- This seam of coal reposes on a layer of clay. 这个煤层处于一层黏土岩之上。
- We need to replenish our stocks of coal. 我们需要再次补充煤的储备。
- This layer of rock contains a lot of flint. 这一岩层中有大量燧石。
- There are vast amount of exploitable gas reserve in the layers of coal. 煤层中还蕴藏着丰富可供开发利用的煤层气。
- Prohibition was laid on the export of coal. 禁止煤炭输出。
- The inner layer of the wall of a spore. 孢子内壁孢子壁的内层
- There is a fine layer of dust on the desk. 桌子上有一层薄薄的尘土。
- He put a shovel of coal on to the fire. 他往火炉里加了一铲煤。
- We had a big delivery of coal today. 今天我们收到大批订购的煤。
- The middle, usually fleshy layer of a fruit wall. 中果皮果皮中间通常含肉较多的那一层
- A fine layer of dust covers everything. 所有的东西都盖了一层薄薄的灰尘。
- The country is short of known deposits of coal. 这个国家缺少已知的煤矿矿床。
- A thin layer of bone, membrane, or other tissue. 骨骼、粘膜或其它组织的薄层
- An inexhaustible supply of coal. 用之不竭的煤炭供应
- China has a wealth of coal, iron and other minerals. 中国有丰富的煤、铁和其它矿产资源。
- The oven holds sufficient heat to fire up a fresh charge of coal. 炉里有足够的热量使新加进的煤燃烧起来。
- A layer of skin peeled off her sun-burnt back. 她晒黑的背上掉了一层皮。
- There are several layers of meaning. 有几层不同的含意。
- Numerical simulation was conducted using UDEC3.0 for the movement of overlaying strata and fracture development caused by the mining of upper protective layers of coal seams with close quarters. 本文利用UDEC3.;0软件对近距离上保护层开采导致的覆岩移动及裂隙发育过程进行数值模拟。
- The altitude of the lowest layer of clouds. 云幕高度最低层云的海拔高度
