queuing

例句：

1. 1.The queue of customers was long and slow.
   顾客队伍很长，很缓慢。
2. 2. The line up for the concert was already formed.
   音乐会的排队已经形成。
3. 3. She waited in line for hours to get her ticket.
   她排队等待了几个小时才买到票。