1. overcome,战胜，克服。
eg：The learner of a second language has many obstacles to overcome.
第二语言学习者有许多障碍要克服。
2. barrier,障碍,阻碍。
eg：They soon overcame the language barrier.
不久他们便克服了语言上的障碍。
3. ritual,仪式,典礼，老规矩，习惯。
eg：She went through her usual ritual of making sure all the doors were locked before she went to bed.
她上床之前按惯例检查一下所有的门是不是都锁上了。
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