hand-washing

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As your student union chairman, I've noticed a concerning trend of absenteeism due to colds, which is impeding learning. To address this, I urge you to adopt healthy habits, including a balanced diet, sufficient sleep, regular exercise, and frequent hand-washing.

导读:浙江大学的学生们发明了一个用空气来洗手的装置，还能节约水资源。A group of senior students from Zhejiang University have successfully developed an air hand-washing device. The device utilizes an infrared ray induction