hitch 表示故障，障碍，可与常见的obstacle和 hindrance 替换
积累句子：
A slight hitch can lead to a deadly disaster.
非常顺利地： without a hitch
法律难题/技术故障： legal hitch/ technical hitch
翻译：
Jay Chou's concert was held in Beijing without a hitch.
场景：他终于得偿所愿，因为他顺利通过了GRE考试
例子：Finally， his efforts pay off,because he passed the GRE without a hitch.
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