n.障碍；绊脚石
Lack of education is an obstacle of success. 缺乏教育是成功的障碍。
He took every obstacle in his stride. 他轻易地度过一切难关。
Overstaffing has become the obstacle for reforms. 人浮于事已成为改革的绊脚石。
Can you smooth away the obstacle on the road? 你可以清除路上的障碍物吗?
n.障碍；名词obstacle的复数
