如果你早上起床时认为未来会更好，那就是美好的一天。否则，就不是。
If you get up in the morning and think the future is going to be better, it is a bright day. Otherwise, it's not.
The energy industry must adapt and evolve to meet the challenges of the 21st century.
系统辨识的挑战不仅在于拟合数据，还在于提取有意义且可推广的模型。
幸福是一种意识状态，它来自于一个人价值的实现。