n.航空郵件；航空郵政
v.航空郵寄
Airmail is quicker than sea mail. 航空郵遞比海上郵遞快。
I would like to send this letter by airmail. 這封信我想寄航空。
Do you want to airmail it or not? 你想發(fā)航空信嗎？
