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1月17日星期四每堂课,老师都要在黑板上写好多字,既劳累又影响身体健康。因此,我想设计一种电子声控黑板。它的
Thursday, January 17 Every class, the teacher must write many words on the blackboard, both tired and affect their health. Therefore, I want to design an electronic voice-activated blackboard. its