每天上学我和爸爸都要经过科技大学的校园,校园里种着许多花草和树木,环境非常优美。有一天,经过校园时,我看见几个叔叔正在一棵大松树的四周挖坑,旁边还放着一袋东西,就不解地问:“爸爸,他们在干什么?”爸爸说:“我也不知道。” I go to school every day, and my father must go through the University of Science and Technology campus, the campus with many flowers and trees, the environment is very beautiful. One day, as I passed through the campus, I saw several uncles digging pits around a large pine tree with a bag of things next to them. They asked unknowingly, “Daddy, what are they doing?” Dad said, “I also do not know.”