The United States has no permanent enemies, no permanent friends, only permanent interests.
美国没有永恒的敌人，也没有永恒的朋友，只有永恒的利益。
您生下我来，把我教养成人，爱惜我，厚待我，尽我的责任去回报您是我的本分，我要服从您，爱您，尊敬您。
Good econometrics is like good carpentry—it's all about using the right tool for the job.
If a program manipulates a large amount of data, it does so in a small number of ways.
正是通过观察和反思的力量，人们才能找到方法。所以我们必须不断挖掘和钻研。
We don't just manufacture chemicals; we enable progress.