Energy security is the cornerstone of national security. We must make every effort to ensure the security of national energy supply.
老师声称代数是完美而自然的、我们应无条件地接受它,而我甚至不能理解什么是数。对我来说数学课完全就是恐怖和折磨。我完全不理解代数,这使我胆怯得不敢问任何问题。
Luck has nothing to do with it, because I have spent many, many hours, countless hours, on the court working for my one moment in time.