您要查找的是不是：
- Noctilucent clouds are ragged extensions of a more widespread and more permanent layer which forms over the summer polar area at the mesopause. 夜光云是在夏季极地中圈顶之上形成的更广泛更持久的层的参差不齐的延伸。
- Nothing can assure permanent happiness. 没有什么东西能确保永久的幸福。
- I'm looking for a permanent appointment. 我正在寻找固定的工作。
- She is looking for permanent employment. 她正在找固定的工作。
- This layer of rock contains a lot of flint. 这一岩层中有大量燧石。
- They established their permanent abode here. 他们在此建立了永久居所。
- Pig iron used as permanent ballast. 压载铁做为永久性压舱物的生铁
- She went to a beauty salon for a permanent. 她到美容院去烫了发。
- The injury left him with a permanent limp. 他受伤后就一直瘸了。
- 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
- A plant having no permanent woody stem; an herb. 草本植物，花草没有永久木茎的植物; 草本植物
- 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
- The doctors couldn't bring about a real (ie permanent) cure. 这些医生都无根治良方。
- A thin layer of bone, membrane, or other tissue. 骨骼、粘膜或其它组织的薄层
- David worked as a jobber before he found a permanent job. 大卫在找到固定工作以前做零工。
