疆界

huà fēn jiāng jiè

划分疆界

fix a boundary

dàng shí zài běi fāng jiāng jiè shang céng yǒu yī xiē zhuān shí jiàn zào de chéng qiáng yǐ dǐ yù wài dí

当时在北方疆界上曾有一些砖石建造的城墙以抵御外敌。

There had been a number of walls built of brick and stone along the northern border to keep the enemies beyond.

tuò zhǎn jiāng jiè

拓展疆界

expand the boundary