The most important questions of life are, for the most part, really only problems of probability.
旧梦是好梦,没有实现,但是我很高兴我有过这些梦。
历史的重量是无法承受的,但我们必须承担它。
成功辨识的关键是找到一个足够灵活的模型结构,以捕捉系统的基本特征,同时又足够简单,可以从现有数据中估计出来。
I'm not afraid of aging. I think it's a privilege to grow old.