n 纵列(队)，行列(line of people or things positioned one behind another) [C，Gp]：march in～成纵队前进;The boys entered the room in a single～. 男孩子排成单行走进屋子。〖同〗 line，queue，rank，row;

(in) single/Indian file 成一路纵队：The soldiers were marching in Indian～. 士兵们成一路纵队前进。

v 排成单行或纵队行进(walk or march in file) [I，I+prep，I+adv]：～across the road/into the hall 排着队穿过马路/走入大厅;The judges～d in/out. 法官们鱼贯而入/出;The passengers～d past the ticket collector. 旅客们排着队从检票员身边走过。