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
- oarfish
- oar from Hemudu
- Oars for the Boat of Art
- OAS
- oasis
- oasis in China
- oasis town
- oasis wet island effect
- O association
- OAT
- oat covered smut
- oat crown rust
- oat diseases
- oat flake
- Oath of Alliance
- Oath of Emperor Taizu of Song
- Oath Site at Houma
- Oath·Midnight Rain
- oat loose smut
- OATP
- oat processing
- oat smut
- oat stem rust
- OATUU
- OAU