Your work will be endless, but your time is finite. You cannot limit the work so you must limit your time. Hours are the only thing you can manage.
科学的精神在于不断质疑和探索,它让我们永远保持对世界的好奇心。
对民主的最大威胁不是来自外部敌人,而是来自内部腐败和公民美德的丧失。