下雨时，孩子们在室内玩耍。
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.
我喜欢暑假是因为我可以外出玩耍；要是下雨，我就可以在室内下棋。
I like it because I can go outside to play. If it rains, I can stay inside and play checkers.
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