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
- paleo-sinkhole
- paleosols
- paleotectonic conditions for coal accumulation
- paleotectonics
- Paleo-Tethys Ocean
- paleotopography
- Paleotropics
- paleo upwelling
- paleovegetation evolution
- paleovegetation of China
- paleo warm pool
- paleoweathering crust
- Paleozoic Era
- paleozoic era
- Paleozoic evolutionary fauna
- paleozoogeographical zonation of China
- Paleozoological Museum of China
- Palermo
- Palermo Circle
- Palermo Stone
- Pales
- pale-shouldered horned toad
- Palestine Areas
- Palestine People’s Uprising
- Palestinian Broadcasting Corporation