1.How much is the postage for sending a surface mail letter to Shanghai.
往上海寄封平信需要贴多少钱的邮票？
2.How much does an ordinary ( registered , air mail) letter to London cost?
寄一封平信（挂号信，航空信）去伦敦要花多少钱。
3.Normally it takes about one week for an air-mail letter to reach America.
通常情况下，航空邮件到达美国需要大约一个星期。
4.Manifold paper : A thin, light-weight paper used for duplicating work with carbon paper or for air mail letter.
打字纸：薄而轻身的纸。作空邮信纸或连同碳纸作为写文件用。
5.Idea 4: At set periodic times of the day send one line of an e-mail letter to your love.
创意4：用电子邮件把情书一句一句的定时发送给TA。
6.Terrorists have to do is hide and mail letter bombs.
恐怖分子要做的就是躲起来并邮寄信件炸弹。
7.In the digital age , writing an old fashioned , snail mail letter to a friend will surely make his day .
在数字化时代，写一封老式的平信给朋友，绝对可以让他高兴一整天。