可持续的基础设施应该平衡经济、社会和环境的效益。

The game of history is usually played by the best and the worst over the heads of the majority in the middle.

"The truth is often more complicated than the stories we tell ourselves."

大街几乎是对的。

学习问题的复杂性通常由假设空间的大小和结构决定。