数据库 数据库新技术 释文 document type definition, DTD 文档类型定义
- YBCO superconductor
- Yb doped laser
- Yb-doped laser
- Y/B ratio
- YBT
- Y chromosome
- Y code
- y-component
- y-coordinate
- Y-cut crystal
- YD
- Y-diffeomorphism
- y-direction
- YE
- Ye
- year
- Year after year
- year book
- yearbook
- Yearbook of China Water Resources
- Yearbook of Emergency Management in China
- Yearbook on the Study of Literature of the Song Dynasty
- year cycle
- yearly audience with the emperor in rotation
- yearly UTC adjustment