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- nacreous layer of shell 贝壳珍珠层
- To be noticed that the spiral grains on the surface of nacreous layer of Hyriopsis schiegeli shells and its pearls are rarely found in other fresh water cultured pearls. 值得注意的是，在池蝶蚌贝壳及其珍珠的珍珠层表面出现螺旋状纹理，这种现象在其它的淡水珍珠（如三角帆蚌贝壳及其珍珠）中极为少见。
- Every crustacean has a layer of shell, which is also called the carapace. 甲壳动物体外都有一层几丁质外壳, 称为甲壳。
- 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。
- Flourier transformation infrared spectroscopy study on the prismatic and nacreous layers of the shell 贝壳棱柱层和珍珠层的傅里叶变化红外光谱
- 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 fine layer of dust covers everything. 所有的东西都盖了一层薄薄的灰尘。
- There is an ornament made of shells on the wall. 墙上有一个贝壳做成的装饰品。
- Factors, including product yield rate, layers of shell mold, technical difficulty, post-treatment process and detecting process, should be comprehensively considered in calculating castings price. 在计算铸件价格时须综合考虑铸件工艺出品率、型壳层数、技术难度、后处理工序和检测试验项目要求等因素。
- A thin layer of bone, membrane, or other tissue. 骨骼、粘膜或其它组织的薄层
- Jean and his workers place a small piece of shell in the oyster. 吉恩和他的工人们在牡蛎中放一小片贝壳。
- Should I leave aside the layers of shell 该不该搁下重重的壳
- The research present situation and advancement of growth structure of nacreous layer are discussed. 对珍珠层生长结构的研究现状与发展趋势予以了综述和讨论。
- There are several layers of meaning. 有几层不同的含意。
- They are covered with a smooth, safe, nacreous layer to let them slip, pearllike, from our souls without real pain. 他们被我们包裹在一层光滑、安全、充满光泽的隔离膜中，仿佛珍珠一样，他们经历的苦难不会让我们的灵魂深处感受到任何真正的痛苦。”
- The growth of successive layers of a cell wall. 敷着，附着细胞壁连续层的生长
- The structure and toughened mechanisms of nacreous layer were introduced to design the laminated composites. 把贝壳的结构机制及韧化机理应用于叠层复合材料的设计中。
- A layer of skin peeled off her sun-burnt back. 她晒黑的背上掉了一层皮。
