n.障礙；絆腳石

Lack of education is an obstacle of success. 缺乏教育是成功的障礙。

He took every obstacle in his stride. 他輕易地度過一切難關(guān)。

Overstaffing has become the obstacle for reforms. 人浮于事已成為改革的絆腳石。

Can you smooth away the obstacle on the road? 你可以清除路上的障礙物嗎?

n.障礙；名詞obstacle的復(fù)數(shù)