数学
shùxué
mathematics
In a story
这次的客人姓宋,是一位退休的数学老师。This time the client was a Mrs Song, a retired maths teacher.装修 · The Renovation · HSK 4
三月的一天,有人交回来一本高中的数学书。One day in March, someone returned a high school maths book.书里的字条 · Notes in the Books · HSK 5

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