surface mail
US /ˈsɜːr.fɪs meɪl/
UK /ˈsɜːr.fɪs meɪl/
1.
平郵, 水陸路郵件
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.
包裹透過平郵寄送，以節省運費。
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Expect longer delivery times for surface mail compared to airmail.
與航空郵件相比，平郵的遞送時間更長。