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。