桥梁不仅是一种结构，也是人类进步的象征。

羊羔有跪下接受母乳的感恩举动，小乌鸦有衔食喂母鸦的情义。

Sustainability isn't an option—it's the foundation of our future.

The difference between a policy and a crusade is that a policy is judged by its results, while a crusade is judged by how good it makes its crusaders feel.

理解另一种文化的唯一方法是假设那种文化的参照框架。

The energy industry must be part of the climate solution, not the problem.