记得有部老电影，名叫《护士日记》，影片中有支插曲，给人留下深深的印象：小燕子穿花衣，年年春天来这里，我问燕子为啥来，燕子说，这里的春天最美丽……燕子来到这里与这里的春天“最美丽”分不开，校园里出现小燕等这样多的鸟类，和校园里这些年自然环境的变化紧密相连。
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