I'm not afraid to fail because I know it's part of success.

伟大的敌人是优秀。

量子力学中存在一些我们仍然无法理解的深刻奥秘。

The climate system is extraordinarily complex, and our understanding of it is still evolving.

愉快是健康的最佳促进者，对心灵和身体同样友好。