dragnet

名词 dragnet:

1. a system of coordinated measures for apprehending (criminals or other individuals)
2. a conical fishnet dragged through the water at great depths
   同义词：trawl, trawl net

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