Time travel is the most frustrating thing in the world. You can't change anything, and you can't stop anything from happening.
时间旅行是世界上最令人沮丧的事情。你无法改变任何事情，也无法阻止任何事情的发生。
The best scientific discoveries often happen at the boundaries between disciplines.
数学的美在于它让我们看到世界上不立即显现的模式和结构。
农业的真正进步不仅以产量衡量成功，还要看生态系统健康。