在很多年后的一天,我重返校园。走近校门,我大吃一惊。咦!这是怎么回事?学校的围墙呢?怎么都成了花草树木?就在我疑惑之时, 从里面走出来一个人,原来是我的小学同学——李云。听说他就是这所学校的设计者。他见我这副面孔,似乎明白了我的心思, 指着那长满了花草的翠绿的墙说:“这是最新发明——‘草砖墙’,它比以前的土砖墙更结实耐用,是用一种草压缩而成的,这种草不会死, Many years later, I returned to school. Approached the school gate, I was shocked. What is going on here? The fence of the school? How have become flowers and trees? Just when I was puzzled, come out from inside a person, turned out to be my primary school classmate - Li Yun. I heard that he is the designer of this school. He saw my deputy, seemed to understand my mind, pointing to the green walls covered with flowers and said: "This is the latest invention - 'straw brick wall', it is more durable than the previous brick walls , Is made of a grass compressed, this grass will not die,