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　　obstacle noun

　　[ˈɑːbstəkl]

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

　　障碍，阻碍

　　例句：

　　The huge tree that had been blown down by the storm was an obstacle to traffic.

　　被风暴刮倒的大树是交通的障碍。