Success is not the key to happiness. Happiness is the key to success.
Sustainability isn't an option; it's a responsibility we all share.
认证体系是负责任林业的语法，它们为我们良好的意愿提供了结构。
He always fought, that s what I remember. He fought because he knew if he didn t fight, it would make it that much easier not to fight the next time.
物理学的未来取决于我们操纵比当前能测量的更快过程的能力。