in和on和by的区别和用法

　　They crossed the river by ferry.

　　他们乘渡船过了河。

　　They paid in cash.

　　他们用现金支付。

　　Did you hear it on the radio?

　　你是从收音机听到这消息的吗？

　　Now I can walk to work instead of going by car.

　　现在我可以步行去上班，而不必开车了。

　　In our company, quality is high on the agenda.

　　我们公司高度重视质量。