Melvin has been an astronaut for 10 years. He says he's trying to be a role model to young African-Americans.

VOA: standard.2010.02.02

I should have said that as an undergraduate, I worked very closely with my dean of students, Ms Phyllis Hoey who is still a role model for me.

应该说还是本科生的时候，我就在学生处主任Phyllis，Hoey小姐身边工作,她至今仍是我的榜样。

普林斯顿公开课 - 人性课程节选

He says whatever Mr.Obama does as president, he has already been a successful role model for community work.

VOA: standard.2010.02.24

Prime Minister Singh called President Obama a "role model for billions and billions of people" around the world.

VOA: standard.2010.06.27