名词

1.[obstacle to sth/to doing sth]

（引申义）障碍；阻碍；绊脚石

2.（本意）障碍物；绊脚石

3.（障碍赛马用词）障碍栅栏；障碍

英语解释

something immaterial that stands in the way and must be circumvented or surmounted

an obstruction that stands in the way (and must be removed or surmounted or circumvented)