中学生课外活动过于单调，学习压力大，8.4%的中学生存在网络成瘾倾向。
High school student's extracurricular activity is too monotonous, the study pressure is high, 8.4% of the junior middle school students had a tendency Internet addiction.
在中学物理的教学实践中，我们可以认识到，我们完全有必要而且也可以通过课堂教学和课外活动来培养中学生的物理模型思维能力。
From the middle school physics teaching practices, we realize that we can develop middle school students' physics model-thinking ability by in-class teaching and out-class activities.
我是一名中学生，学习的课程很多，但学校里又有丰富多彩的课外活动。有的同学参加英语角的活动；
I am a middle school student, course of study is numerous, but there are rich and colorful extracurricular activities in the school. Some classmates participate in the activity of the English corner;
我是一名中学生，学习的课程很多，但学校里又有丰富多彩的课外活动。有的同学参加英语角的活动；
I am a middle school student, course of study is numerous, but there are rich and colorful extracurricular activities in the school. Some classmates participate in the activity of the English corner;
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