The world owes all its onward impulses to men ill at ease; the happy man inevitably confines himself within ancient limits.
思考的过程不仅仅是把一件事加到另一件事上;它在于观察结构特征和结构要求的操作。
Tennis is a brutal sport. There is no place to hide out there.
编写无错误程序的方式有两种:只有第三个有效。