Innovation in mining technology isn't optional - it's essential for our survival and growth.
文学需要一种已经消失的思维习惯。
I'm the reason your time won't fly.
大脑有专门的网络来维持警觉性、定向感觉事件和解决反应之间的冲突。
追求数学真理是一项既个人又普遍的努力。