求翻译：Men cannot all be great leaders, for few of us have all the necessary qualities. But we can be trained, or train ourselves,to develop what good qualities we have .It has been said that no man can command until he has learnt to obey ,and obedience to lawful authorty is part of our education. Another point is unselfishne是什么意思？

待解决 悬赏分：1 - 离问题结束还有