工学 工程水力学 释 drop 跌水 使上游渠道水流自由跌落到下游渠道的连接建筑物。
drop ①滴 ②下落，降落
数据库 数据库管理系统及其实现技术 释文 drop 撤销
- population extinction
- population fluctuations
- population genetics
- population geographic database
- population geography
- population growth
- population growth model
- population history
- population I
- population increase tendency
- population information management system
- population inversion
- population kurtosis
- population land
- population land dispersion analysis
- population management
- population map
- population mathematics
- population mean
- Population Mechanical Change
- population migration
- population migration theories
- population model
- population moment
- population natural dynamics