我们必须停止空谈改变,开始行动。
The traditional disputes of philosophers are, for the most part, as unwarranted as they are unfruitful.
"Truth is not always the most comforting thing, but it is the most necessary."
我们教授一门学科不是为了培养关于该学科的小型活图书馆,而是让学生自己学会数学思考。