早上８点前后

around eight o'clock in the morning

在３月中前后

around the middle of March

前后两年零三个月。

Two years and three months from start to finish.

从出国到回国，前后一共５年。

I was abroad for five years in total.

前后夹攻

pincer attack from the front and rear

前后颠倒

get mixed up

前后一致

be consistent

前后矛盾

be inconsistent

屋子前后种了各种蔬菜。

All sorts of vegetables are planted in front of and behind the house.