a couple of

例句：

1. 1. I need a couple of hoursto finish this report.
   我需要几个小时来完成这份报告。
2. 2. She has a couple of friendswho are very supportive.
   她有几个非常支持她的好朋友。
3. 3. We'll need a coupleof extra workers to finish the project ontime.
   我们需要额外的工人来按时完成这个项目。