学生:我们为什么要写周围事物和环境的变迁? 老师:这个问题很有意思。我想,凡事要变,总有它变的原因。我们对“变”的现象进行观察或调查,是为了分析探究“变”的缘由,反思“变”的成效。同学们在观察周围事物或环境的时候可以作进一步的思考:比如,城市绿化的大面 Students: Why do we have to write about changes in things and the environment? Teacher: This question is very interesting. I think that when everything changes, there are always reasons for it to change. We observe or investigate the phenomenon of “change” in order to analyze the causes of “change” and reflect the effectiveness of “change.” Students can think further when they are observing the surrounding things or the environment: For example, the large area of ​​urban greening