解释：不可以不知道活着的乐趣，也不可以不知道虚度光阴的担忧。
那些许诺我们人间天堂的人除了地狱什么都没有搞出来。
The deepest theorems in mathematics often have the simplest statements.
The best leaders are those who listen more than they speak.
在软件系统中，蠕虫通常是早起的鸟儿。
"The value of a man should be seen in what he gives and not in what he is able to receive."