前后

1. around (a certain time); about

♦ 天亮~ shortly before and after daybreak

♦ 1949 年~ round1949

♦ 春节~ around the Spring Festival

2. from beginning to end (in time)

♦ 从动工到完成, 这项工程~只用了十个月。 The entire project, from beginning to end, took only ten months.

3. in front and behind

♦ 房子~都有树。 There are trees both in front and at the back of the house.

♦ ~次序不要颠倒。 Don't get the order mixed up.

4. people or things of the same kind in succession

♦ ~三种版本 three consecutive editions

♦ 你的~几封信都已收到。 I've received all your letters.