二叠纪盆地将在未来几十年内保持美国石油生产的皇冠地位。
I learned that the market is not a casino, but a place where you can make money if you are disciplined and patient.
质数就是当你把所有模式都去掉后剩下的东西。我认为质数就像生活。它们非常合乎逻辑,但你永远无法弄清楚规则,即使你花所有时间思考它们。