I think the most important thing in life is to love and be loved in return.

相对论不仅仅是一种科学理论，而且是一种哲学理论，它深刻地影响了我们对宇宙的概念。

The ocean is not just a resource; it's a legacy we must protect for future generations.

在田野的寂静中，过去的回声越来越响亮。