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1·Goods may be sent by surface mail or airmail.

货物可通过平邮或空运发送。《柯林斯英汉双解大词典》

2·Air mail or surface mail?

航空还是陆运呢？

3·Post officer: Airmail or surface mail?

邮局人员：航空邮件还是普通邮件？

4·Surface mail, please.

请寄普通邮件吧。

5·Would you like it air mail or surface mail?

你想要空运还是平邮?。

6·About 7 weeks by surface mail. But it is more cheaper.

海运要花费大约7周的时间，但会便宜多了。

7·Do you want to mail them by surface mail or by airmail?

您想按水陆路邮寄还是按航空邮寄?。

8·Why don't you send your printed matter by surface mail ?

为什么你不按普通邮件寄这印刷品？

9·Tim: How long would surface mail take, compared with airmail?

蒂姆：和航空邮件相比，普通邮件需要花多久的时间？

10·I suppose airmail is faster and more expensive than surface mail.

我想航空邮寄比平寄要快一些也更贵一些吧。