I get to work by bus. Sometimes by subway.
我坐公共汽车去上班，有时候坐地铁。
Traveling by subway can sometimes be a challenge, especially during rush hour.
乘地铁有时会是一种挑战，尤其是在高峰时间。
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。
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