on与about 二者都是介词,意为“关于,论及”等。一般情况下,二者可以互相替换,但二者有点区别。about常用于简单的或浅显的论述等,是一般用语,多用于讲故事,谈话。而on多用于系统论述或专题讲演、论著等,具有学术性,如,The teacher told us a story about Lei Feng. It's very moving. He will give us a talk on the history of the Party. 希望帮到你。