貼著底拖過去的網
這一支就是畫面本身，先站穩了，另一支才有得借。
noun · C1
A large fishing net that is pulled along the bottom of a river, a lake or the sea, to bring up whatever is lying down there.
拖網
核心畫面
Picture a heavy net lying flat on the bottom of a lake, with a boat pulling it slowly forward. The net does not choose. Whatever is in its path goes in: the fish that were wanted, and also weed, mud, shells and small creatures nobody was after. When the net comes up, the catch is there, but so is everything else. That one picture is the whole word. Move it onto dry land, keep the not-choosing, and you have a police operation that closes a whole area at once and checks every person in it.
可以想成一張很重的網平貼在湖底，船在前面慢慢把它往前拖。這張網不會挑。經過的東西全部進去：想抓的魚會進去，水草、泥巴…更多收起
可以想成一張很重的網平貼在湖底，船在前面慢慢把它往前拖。這張網不會挑。經過的東西全部進去：想抓的魚會進去，水草、泥巴、貝殼、沒人要的小生物也會進去。網拉上來的時候，要的東西在裡面，不要的也在裡面。整個字就是這一個畫面。把它搬到陸地上，保留「不挑」這一點，就成了警方那種一次封住整片、經過的人全部盤查的做法。From the word’s history
Simply drag plus net, a very old compound: Old English draegnet, with the same structure in Swedish dragnaet and Norwegian dragnett. The name is just the action it describes.
就是 drag（拖）加 net（網），而且是很老的組合：古英文有 dræġnet，瑞典文 dragnät、挪威文 dragnett 結構一樣。這個字的名字，本身就是它的動作。
Wiktionary etymology supplied in this packet (source_ref kaikki:3f6f69a190036ae4:1276411857): From drag + net, probably based on the model of Middle English draynet, Old English draegnet; cognate with Swedish dragnaet, Norwegian dragnett.
Two branches
撒在人身上的那張網
把水底那張網搬到街上：一樣同時蓋住一整片，一樣不挑，經過的人都得被查一遍。
noun · C1
A wide and very thorough police search, in which many people and places are checked at once so that the person the police want cannot slip away.
地毯式搜捕