[ C or U ] something that blocks a road, passage, entrance, etc. so that nothing can go along it, or the act of blocking something in this way阻塞物,障碍物
[ U ] behaviour or actions that prevent something from happening or working correctly阻碍;阻止,阻挠;妨碍
[ U ] in sport an occasion when one player gets in the way of another and so prevents them from moving freely(体育项目中的)阻挡犯规
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