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词组 obstacle
释义 1.obstacle 指一个一个的障碍,并不是抽象名词,如可以说 He has conquered a great many obstacles,不可说 He has conquered a great deal of obstacle.

2.obstacle 后面接 to 和名词或动名词。例如:This is an obstacle to progress.和 There are many obstacles to learning a language from conversation.
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更新时间:2024/10/30 14:13:04