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。
- Carrying down or away. Used of a duct or vessel. 传送的指通过导管或管道传送下来的或输送的
- 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。
- 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
- ducting layer 波导层
- A duct often contains cross braces. 管道内往往是有支撑拉条。
- A tube or duct for enclosing electric wires or cable. 线管包裹电线或电缆的管子或沟道
- 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
- Remove the air cleaner and inlet ducting. 拆风隔/风箱同入风管。
- A/C duct and vent duct structure of W/H Deck. 驾驶甲板空调、机械风管结构。
- Maybe you have never heard of duct tape. 也许你还没有听说过管道胶带吧。
- The tie on the cystic duct may slip off. 在胆囊管上的结扎可能滑脱。
- 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
- Balancing components shall have duct jacket. 弹性补偿元件应有导流套;
