a system of coordinated measures for apprehending (criminals or other individuals)
a conical fishnet dragged through the water at great depths
同义词：trawl, trawl net
dragnet详细解释
drag.net n.（名词）A system of coordinated procedures for apprehending criminal suspects or other wanted persons.警网，罗网：用于捕获嫌疑罪犯或其它所需要的人的一个相互协调的系统 A net for trawling; a trawl.拖网：用于在水底拖曳捕鱼的网；拖网A net for catching small game.猎网：用于捕获小猎物的网
