data semantics 数据语义学
数据库 数据库新技术 释文 data semantics 数据语义
- upland plant
- upland rice
- upland rice cyst nematode disease
- upland soil microbes
- UPLC
- up-leg light time
- uplift
- uplift pile
- uplift pressure
- uplink
- upload
- UPM
- upness
- Upolu Island
- U Ponnya
- Upon Passing Through Qu'e When Beginning My Service as Aide to the General of Zhenjun
- upper
- upper-air measurement instrument
- upper-air observation
- upper airway obstruction
- upper-air weather station
- upper-and-lower-functions method
- upper and lower solution method
- upper approximate limit
- upper approximate value