释义：真正的学习唤醒灵魂深处的觉醒。

The rule of recognition is the ultimate rule in a legal system, which identifies the criteria for valid law.

The only thing you have to fear is fear itself.

“等着吧，你要下地狱的。”“笑话，我都在地狱里了，还怎么下啊。”

石油的未来在于平衡经济增长与环境管理。