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。
- 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。
- Space exploration is still in its infancy. 宇宙探索仍处于初级阶段
- 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
- They decided to make a full exploration of the accident. 他们决定对事故做一次全盘研究。
- Humanity has made great progress in space exploration and medicine. 人类在太空研究和医学上取得了很大进展。
- 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
- The Elizabethan age was a time of exploration and discovery. 英国女王伊丽莎白一世时代是探索和发现的时代。
- 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
- Professor Field was devoted to the exploration of the frontier of Medicine. 菲尔德教授致力於探索医学研究的新领域。
- Social development suggests universal exploration. 社会的进步促使人类做出对宇宙空间的探索。
- Arctic exploration; exploration of new theories. 北极探险；新理论的探索
- 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
- Men venture their lives in space exploration. 人们冒着生命危险从事太空探索。
