be confident about 和of的区别

　　例句：

　　I am confident about the future of our company.

　　我对我们公司的未来充满信心。

　　I am confident about the prospect of my career.

　　我对我的职业前景充满信心。

　　We can be fairly confident of our ability to create tests that are valid and reliable.

　　我们可以相信我们有能力编写合理可信的测试题。

　　I have every reason to be confident of our victory.

　　我有充分的理由坚信胜利是属于我们的。

　　Hey, you must be confident of yourself if you want to succeed.

　　你必须对自己有信心才能成功！