We are at a unique stage in our history. Never before have we had such an awareness of what we are doing to the planet, and never before have we had the power to do something about it.
我们正处于历史上一个独特的阶段。我们从未如此清楚地意识到我们对地球所做的一切，也从未有过能力对此采取行动。
Coal miners are the unsung heroes of America's industrial strength.
世界不是由思想或想象力运行的，而是由意见运行的。
因此，教学艺术无非是时间、科目和方法的巧妙安排。
咱们来较量一下吧！你和我！
故事不仅是讲述的内容，也是未被讲述的部分。
Technology should serve humanity, not the other way around.
物理学中的每一个发现都打开了一扇通往新奥秘的门。
"世界是一面镜子，而镜子是一场游戏。"