释义
n. 障碍
例句
1. Lack of education is an obstacle of success. 缺乏教育是成功的障碍。 2. Verification (eg Checking that weapons have been removed) could be an obstacle to an arms agreement. 裁减军备协议难以达成, 症结在於如何证实（如检查武器确已销毁）.