农业效率绝不能以牺牲环境管理为代价。

Sustainability is the future of quarrying, and we must act now.

The Langlands program is a vision of how mathematics could be unified.

I don’t think you can compare different eras. Every era has its own challenges and its own special things.

要么你重复每个人都在说的相同传统教条，要么你说一些真实的东西，而它会听起来像是来自海王星。