Why does the conductor cut a hole in your railroad ticket?

列车员为什么在你的火车票上切一个洞？

youdao

I bought a round trip bus ticket to cut the budget.

我买往返火汽车票来降低预算。

youdao

I bought a round trip bus ticket to cut the budget.

我买往返火汽车票来降低预算。

youdao