1. 释义：a problem or difficulty that you must deal with before you can achieve something 障碍，困难
2. 例句：
Life is all about jumping over one hurdle after another and keeping moving on.
生活就是解决一个又一个问题，不断往前走的过程。
Every entrepreneur has to clear the financial hurdle to get their project started.
3. 造句：
中国学生申请赴美留学面临的一大障碍是托福考试。
A big hurdle facing many Chinese students who apply for learning in America is TOEFL.
