第 66 课: 单独的（地），人群和朋友-5

Someone is walking alone down the steps. 有个人在下台阶

Several people are walking down the steps. 几个人在下台阶

A whole crowd of people are standing on the steps. 有一大群人站在台阶上

A whole crowd of people are walking on the sidewalk. 有一群人正在人行道上走

A huge crowd of people is racing. 一大群人在赛跑

Several people are racing against each other. 几个人在赛跑

These two people are racing, but not against each other. 这两个人在赛跑，但她们不是对手

This person is running alone, but he is not racing. 这个人自己在跑，不是在比赛