1. 一组人；一批东西
A line-up is a group of people or a series of things that have been gathered together to be part of a particular event.
e.g. Ryan Giggs is likely to be in Wales's starting line-up for their World Cup qualifying match...
瑞恩·吉格斯可能出现在威尔士队世界杯预选赛的首发阵容中。
e.g. The programme is back for a new series with a great line-up of musicians and comedy acts.
该节目重新开播了，新系列中汇集了一大批音乐家和喜剧剧目。
2. （为识别嫌疑犯）警方安排有待辨认的一列人
At a line-up, a witness to a crime tries to identify the criminal from among a line of people.
e.g. He failed to identify Graham from photographs, but later picked him out of a police line-up.
他没能从疑犯照片中指认出格雷厄姆，但后来在警方安排的列队辨认中把他挑了出来。