您要查找的是不是：
- This layer of rock contains a lot of flint. 这一岩层中有大量燧石。
- Layered gravel and charcoal to make a filter. 将砂砾和木炭分层以做成过滤器
- 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。
- 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
- The bottom layer is a mixture of sand and clay. 最下面的一层是沙和泥的混合物。
- A fine layer of dust covers everything. 所有的东西都盖了一层薄薄的灰尘。
- 8.The following new opinions: without caving zone coal layer extraction in efflorescent oxygenized belts; 提出了风氧化带煤层开采无垮落带；
- 5.The following new opinions: without caving zone coal layer extraction in efflorescent oxygenized belts; 提出了风氧化带煤层开采无垮落带；
- The refuse of sugar cane after extraction of the juice. 甘蔗渣在汁液被榨完以后剩下的甘蔗废料
- A layer, as of doubled-over cloth or of paperboard. 一层一层，如折叠过的布料或纸板的
- A surface, layer, or mass of frozen water. 冰面冻结的水的面、层或块
- A thin layer of bone, membrane, or other tissue. 骨骼、粘膜或其它组织的薄层
- 2.The following new opinions: without caving zone coal layer extraction in efflorescent oxygenized belts; 提出了风氧化带煤层开采无垮落带；
- A thin, flat layer or scale, as that of a fish. 外表组织薄而平的一层或鳞状物，如鱼鳞
- layered extraction 分层提取
- Used in or obtained by extraction. 提取的用于提取的，或通过提取得到的
- Government in America is like a layered pyramid. 美国政府就像是分层的金字塔。
- The extraction of a root of a quantity. 开方，求一个数的方根
- The layered structure common to metamorphic rocks. 叶理象变质岩一样的岩石层状结构
