They may play to passers-by in the street or subway so that they can earn some extra money.

他们可能在街上或地铁里为过路者演奏，这样他们可以多挣一些钱。

youdao

Sometimes they may play to passers-by in the street or subway so that they can earn some extra money for themselves or to pay for their instruments.

有时他们可能在大街上或地铁里为过路人演奏，这样他们可以为自己或自己要买的乐器多挣一些钱。

youdao

Sometimes they may play to passers-by in the street or subway so that they can earn some extra money for themselves or to pay for their instruments.

有时他们可能在街上或是地铁内为过路人演奏，这样他们可以为自己或他们要买的乐器多挣一些钱。

youdao

To test their theory they monitored the daily outdoor routines of two people, one was alone and the other was accompanied by a dog trained to ignore passers-by so it would initiate social contact.

BBC: Dogs help you make friends

Regardless of all of the above, one thing you should always do when traveling around China is carry with you Chinese-language business cards of your hotel or of places you wish to visit so you can show passers-by, taxi drivers, bus conductors and the like.

CNN: 5 top tips for China first-timers