1. N-COUNT A sump is a low-lying open area where waste water gathers. 水池

2. N-COUNT A sump is a deep cave which is often filled with water. 集水坑

3. N-COUNT The sump is the place under an engine which holds the engine oil. (發(fā)動(dòng)機(jī)下麪的)集油槽[英國(guó)英語]