他在人群中感到孤独。

He felt lonely in the crowd.

我穿过了赶着上火车的人群。

I ran through the crowd of people who were hurrying to get on the train.

我更愿意只是帮忙照顾人群。

I'd prefer just to help out with the crowds.

大批人群出来观看慈善表演。

Crowds of people turned out to watch the charity performance.

他在人群中很突出。

He stands out in the crowd.