letter post的用法和样例：
例句
- If you send your letter first class it will get there quicker.
要是你按第一类邮件寄，这封信就会到得快些。 - A first-class letter should arrive the following day.
按第一类邮件投递的信应於次日到达。
letter post的相关资料：
临近单词
Letterio
letter
Letters of complaint flooded in.
Letter of Honored Guest Invitation
letters and characters as patterns
Letters are delivered every day.
Letter symbols for knitting stitch
letter and code information content
Letter of general average guarantee
Letter of Member Interests Transfer
LETTERS FROM THE HAWAIIAN ANCESTORS
letter and numerical dialing system
