Delay the program so that poor academic performance.
耽误课程使学习成绩下降。
A student with poor academic performance tables repair bench, but hand experts.
学习成绩差的学生修桌修凳可是有一手。
In teenagers and young children, lack of sleep can result in attention disorders and poor academic performance.
对于青少年和儿童,睡眠不足会导致注意力混乱,学习成绩差。
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