| Front | obstruction, barrier, hindrance, obstacle, bar |
|---|---|
| Back | 这组词都有“障碍(物)”的意思，其区别是：obstruction: 常既指具体的障碍又可指抽象或喻意上的阻碍。barrier: 常指临时的或者可能跨越的障碍。hindrance: 指妨碍他人进步或做事的人或物。obstacle: 指在达到目的或前进的过程中必须消除或绕过的障碍物，也指起阻碍作用等情况。bar: 既可指阻止进出或通过的栅栏一类的障碍物，也可用于抽象意义障碍。 |
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