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。
- 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。
- ionosphere layer 电离层
- 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。
- ionosphere layer refraction 电离层折射
- 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
- The ionosphere is basically dragged away. 电离层几乎被拖走。
- A thin layer of bone, membrane, or other tissue. 骨骼、粘膜或其它组织的薄层
- abnormal ionosphere layer 异常电离层
- 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
- Its upper limit is determined by the conditions in the ionosphere. 其上限由电离层的状态而决定。
- Rockets and artificial satellites can go far above the ionosphere. 火箭和人造卫星能够到达电离层以上极远的地方。
- Having a cortex or a similar specialized outer layer. 有皮的有皮的或具有相似的专门发育的外部覆盖的
- Propagation of ultra short wave and microwave in the ionosphere. 见电离层无线电波传播。
- A coat or layer enveloping an organ or a part. 被膜一种覆盖器官或身体部位的覆盖层或包被
- A layer of skin peeled off her sun-burnt back. 她晒黑的背上掉了一层皮。
