obstacle

A massive fallen tree acted as a physical obstacle, preventing any vehicles from passing through the narrow canyon.

(Chinese) 一棵巨大的倒下的树成了物理障碍，阻止了任何车辆通过这条狭窄的峡谷。

Language barriers can be a significant obstacle for international students trying to find local jobs.

(Chinese) 对于试图寻找当地工作的留学生来说，语言障碍可能是一个重大的障碍。