The student began to nod off during math class.

那学生上数学课的时候开始打盹。

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During his math class, the boy tried to win over his classmate's heart.

上数学课时，这男孩想获得同学的欢心。

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During his math class, the boy tried to win over his classmate's heart.

上数学课时，这男孩想获得同学的欢心。

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