Definition: a thing that blocks your way and is difficult to go around Level: C1
徒步者发现了一个意外的障碍挡住了他们的路。
The hikers found an unexpected ___obstacle blocking their path.
他们必须克服许多障碍才能实现目标。
They had to overcome many ___obstacles to achieve their goal.
语言障碍可能是国际商务中的一个重大障碍。
Language barriers can be a significant ___obstacle in international business.
