flex 开源的一个bolg程序，对初学者很有用的哦，-A bolg flex open-source program, very useful for beginners Oh,

FLEX 的入门学习，对初学者很有用。有需要的友友可以下载看看。-FLEX is the beginning of the study, very useful for beginners. A friend in need of a friend can download to see see.