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[四级词汇群记法] 四级词汇群记法 第61期：什么是你梦想的"障碍物"？
He was satisfied there was no legal impediment to the marriage. 这一婚姻没有任何司法上的障碍，他对此很满意。 John's slight speech impediment made it difficult for his mother to understand him. 约翰有轻微的言语障碍，这令母亲很难理解他..2013-04-29 编辑：jenny
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[高中英语阅读理解练习100篇] 高中英语阅读理解练习100篇 第26期:obstruction
Under proper conditions, sound waves will be reflected from a hillside or other such obstruction. Sound travels at the rate of about one-fifth of a mile per second.2015-06-19 编辑：daisy
