/ræk ||; ræk/noun [C] (often in compounds 常用于构成复合词) a piece of equipment, usually made of bars, that you can put things in or on （放置对象的）架子: I got on the train and put my bags up in the luggage rack. 我登上火车，把包放在行李架上。We need a roof rack on the car for all this luggage. 我们需要一个车顶架来放所有这些行李。 ☞picture at laboratory 见laboratory插图 go to rack and ruin to be in or get into a bad state because of a lack of care （因缺乏照料而）变坏，一团糟；年久失修而毁坏