surface mail
US /ˈsɜːr.fɪs meɪl/
UK /ˈsɜːr.fɪs meɪl/
1.
平邮, 水陆路邮件
mail that is transported by land or sea rather than by air
:
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The package was sent by surface mail to save on shipping costs.
包裹通过平邮寄送，以节省运费。
•
Expect longer delivery times for surface mail compared to airmail.
与航空邮件相比，平邮的递送时间更长。