理学 层 释 bed 层 对于识别度高、横向延伸较远且具有特殊地质意义的一个或多个单层所划分的岩石地层单位。
＞代数几何＞代数曲线＞释义 sheaf 层 lamina 层，片 layer 层 sheaf 层†，束 stratum 层† tier 层，等级
网络与数据通信 协议体系与组成结构 释文 layer 层
- ownership of forest resources
- ownership of means of production in socialist society
- ownership of natural resources
- ownership of sports event
- ownership of trustees
- ownership stamp
- ownership structure
- ownership survey
- ownership verification and demarcation of water conservancy project
- own-rooted seedling
- O. W. Richardson
- O. W. Richardson, 1879—1959
- OWSpace
- O Wudaghon
- Ox
- oxacephems
- oxacide
- oxacyclobutane
- oxacyclobutane; oxetane
- oxacyclobutanone
- oxacyclobutene
- oxacyclobutene; oxete; oxetene
- oxacycloheptatriene
- oxacycloheptatriene; oxepin
- oxacyclopropane