Goods may be sent by surface mail or airmail.

货物可通过平邮或空运发送。

Air mail or surface mail?

航空还是陆运呢？

Post officer: Airmail or surface mail?

邮局人员：航空邮件还是普通邮件？

Surface mail, please.

请寄普通邮件吧。

Would you like it air mail or surface mail?

你想要空运还是平邮?。