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Solfege books are best used in a class environment with a teacher.
视练书最好是在有老师的情况下使用。
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Classroom seating arrangements are an important component in class environment.
课堂座位安排是班级环境的重要组成部分。
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Classroom seating arrangements are an important component in class environment.
课堂座位安排是班级环境的重要组成部分。
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