1)搭配
major/big/first+hurdle: The first big hurdle in putting your car on the road is getting insurance.
clear/overcome/jump over+hurdle: You have already overcome the first major hurdle by paassing the entrance exam.
fall at+hurdle: The plan fell at the first hurdle.
2) To get admitted to US colleges, Chinese students have to clear a difficult hurdle: TOEFL, an English language proficiency test.(中国学生申请赴美留学面临的一大障碍是托福考试)
3)例子:Forgetting is a major hurdle in learning English.(遗忘是学习英语的一大障碍)
场景:学英语
4)takeways: dust(n.灰尘；v.擦去灰尘)；hurdle(n.障碍；v.跨越障碍)
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