研究生?你是研究生?怎么可能?你一定觉得惊讶。哈哈,告诉你,其实啊,我只是一个比较喜欢研究爬山虎的小学生罢了。小时候,我经常站在阳台上观察对面人家房顶的那一片“绿藤”。妈妈告诉我那是爬山虎,它们会用自己无数个“小脚丫”使劲地往上爬。而我在观察它们的同时,有两个问题一直在我脑海中盘旋:这爬山虎到底是靠什么生长的呢?为什么只朝上长呢? Graduate student? Are you a graduate student? How is it possible? You must be surprised. Haha, tell you, Actually, I’m just a pupil who likes to study ivy. As a kid, I often stood on the balcony to observe the roof of the other people across the “green vine”. Mom told me that it is the ivy, they will use their innumerable “little feet” to climb hard. And while I was observing them, there were two problems that kept hovering in my head: what did the Parthenocissus grow from? Why only grow upward?