by air mail的意思|示意

I sent it by air mail.

我用航空邮件把它寄出去了。

I want to send this letter to China, by air mail.

我想把这封信航空邮到中国。

You want to send a package by air mail. As it is only a book you send it as printed matter.

你要航空邮寄一个包裹。因为仅仅是一本书，所以你决定按印刷品邮寄。

How much is the by air mail?

那么，就得当航空小包邮寄。

Do you want to remit the money by air mail or by cable, Sir?

您想要航空信汇还是电汇，先生？

Now, one more thing, I want to send a package by air mail.

噢，还有一件事，我要寄一个航空邮包。