If you use something as an illustrative example, or for illustrative purposes, you use it to show that what you are saying is true or to make your meaning clearer.
例句
A second illustrative example was taken from The Observer newspaper...另一個說明性的例子摘自《觀察家報》。The following excerpt is illustrative of her interaction with students.接下來的節選部分可以說明她與學生的互動情況。