名詞 mailing:

1. mail sent by a sender at one time
2. the transmission of a letter
   同義詞：posting

動詞 mail:

1. send via the postal service
   同義詞：mail, get off
2. cause to be directed or transmitted to another place
   同義詞：mail, post, send

1. There's been a slight hiccup in our mailing system.
   我們的郵政系統(tǒng)臨時出了一點小問題。
2. He addressed the envelope before mailing the letter.
   寄信前，他在信封上寫上地址。
3. I'm always upset when I don't get any mail.
   我接不到任何郵件時總是心煩意亂。
4. The charge for mailing an item.
   郵資郵寄的物品所需的費用
5. Please add my name to your mailing list.
   請把我的名字加入你們的郵寄名單中。

mail.ing

n.（名詞）
Something sent by mail.
郵件：郵寄的東西
A batch of mail dispatched at one time by a sender.
由郵遞員同時分送的一批郵件