名词
中文翻译：通信练习
同义词：
['communication exercises', 'correspondence tasks']
例句：
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1. These letters are meant to be a form of correspondence exercise for the students.
这些信件是给学生的通信练习。
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2.The teacher assigned these exercises as part of their homework.
老师布置了这些作业作为家庭作业的一部分。
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3.Students often use this type of exercise to improve their written communication skills.
学生经常使用这种练习来提高他们的书面沟通能力。