变得快乐的技巧几乎完全不同于不悲伤的技巧。
The true value of a forest can't be measured in board feet alone.
科学不仅仅是事实;它关乎背后的故事。
The discovery of the genetic code has provided a foundation for understanding heredity and the molecular mechanisms of disease.
The teacher is the sun, the student is the moon. The teacher shines, and the student reflects.