None of us is afraid of difficulties.
我们当中没有一个人害怕困难。

none “没有人”：

None of you can get the scholarship.
你们没人能得到奖学金。

be #afraid of ...害怕
I'm afraid of bugs.
我害怕虫子。

difficulty 困难

He spoke slowly and with great difficulty.
他话说得很慢，而且很吃力。