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obstacle n.障碍
-Lack of education is an obstacle to success.
constitute an obstacle to 构成……障碍
constitution n.宪法
remove/overcome an obstacle克服障碍
put obstacle in sb’s way
妨碍某人的发展
obstacle to
“to”
Key/answer/advantage/disadvantage/
admission/damage + to
obstacle/obstruction/hindrance比较：
obstacle 阻于途中的物体，也指受阻碍的状况
obstruction 障碍物，阻塞通道的东西
-There must be an obstruction in the pipe.
hindrance 阻碍事物发展的人或物，重点在妨碍事物的发展
-You are more of hindrance than help.
As we bumped over the dusty track, we swerved to avoid large boulders.
The wheels scooped up stones which hammered ominously under the car.
What a relief it was when the boulders suddenly disappeared, giving way to a stretch of plain where the only obstacles were clumps of bushes.
But there was worse to come.
Just ahead of us there was a huge fissure.
