ordinary mail

基本解释

Clerk: And by air or ordinary mail?
職員：航空郵寄還是普通郵寄？
How did you send the letter, by airmail or by ordinary mail?
你是怎麽發送的這信，是通過航天郵件還是普通郵件？
Contrasting with the general safe mail system, the system is based on the ordinary mail agreement.
與一般的安全郵件從協議上改進不同，論文實現的系統是建立在普通郵件協議之上的。

Furthermore, information regarding the largest brokerages is only provided via ordinary mail, too late for an investor to review prior to making an investment decision.
FORBES: NASD Threatens Suit Over The Siedle Directory of Securities Dealers (March 1, 2002)
Justice Stephen Breyer said that in today's world, a registered letter is worse than ordinary mail, noting that "we don't all have butlers at the door" and asking why the U.S. Post Office can't be more flexible, like Federal Express.
FORBES: Magazine Article
Photo attachments require huge gobs of bandwidth compared with ordinary e-mail.
FORBES: Digital Rules