在户外玩耍可以让孩子们放松，减少紧张感，帮助他们解决问题。
Playing outside enables children to relax, reduces tension and helps them solve problems.
孩子需要在户外玩耍。
导致视力下降的主要原因有两个：花在室内学习的时间太多，花在户外玩耍的时间太少。
Two main reasons can cause poor eyesight: too much time spent indoors studying and too little time spent outdoors playing.
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