73. In the first place， extra studies bring about unhealthy impacts on physical growth of children. Educational experts point out that， it is equally important to take some sport activities instead of extra studies when children have spent the whole day in a boring classroom.
首先，额外的学习对孩子们的身体发育是不利的。教育专家指出，孩子们在枯燥的教室里呆了一整天后，从事一些体育活动，而不是额外的学习，是非常重要的。
74. Children are undergoing fast physical development； lack of physical exercise may produce disastrous influence on their later life.
孩子们正处于身体快速发育时期，缺乏体育锻炼可能会对他们未来的生活造成严重的影响。
75. In the second place， from psychological aspect， the majority of children seem to tend to have an unfavorable attitude toward additional educational activities.
第二，从心理上讲，大部分孩子似乎对额外的学习没有什么好感。
76. It is hard to imagine a student focusing their energy on textbook while other children are playing.
当别的孩子在玩耍的时候，很难想象一个学生能集中精力在课本上。