CNN news 2010-06-25 加文本

1.As a country, we have a huge challenge to make sure many more of our students and many more of our young black boys are successful.

make sure设法确保出现某事物

例句：We and our friends will make sure of that.
      我们和我们的朋友要确保这一点。

2.Because it's not just to put a black face in front of the students, but to put one who cares, to put one who can advocate for them, who's committed to their futures and their success.

not just but不仅…而且,相当于not only,but also