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
- North Africa
- North America
- North American Air Defense Agreement
- North American Alfalfa Improvement Conference
- North American Association of Fisheries Economists
- North American Broadcasters Association
- North American Congress on Latin America
- North American Drama Therapy Association
- North America Nebula
- North American Free Trade Agreement
- North American Free Trade Area
- North American free trade area
- North American Indian
- North American Indian Languages
- North American Nature Photography Association
- north American nebula
- North American shield
- North America plate
- north america red fox
- Northampton
- North and Central American hydropower resources
- Northanger Abbey
- North Asia
- North Asia race
- North Atlantic currents