drag a lake/river etcSCPLOOK FORto look for something in a lake, river etc by pulling a heavy net along the bottom 〔用沉重的拖网〕搜索湖底/河底等 The police are dragging the lake for the missing girl’s body. 警方在用拖网搜索湖底，寻找失踪女孩的尸体。
drag a lake/river etc• Police were still dragging lakes all over the Catskills.
→ drag a lake/river etc at drag1(3)