问题不在于事物是否存在,而在于它是否具有能够在没有我们的情况下存在的本质。
The best time to plant a tree was 20 years ago. The second-best time is now.
We don't inherit the earth from our ancestors; we borrow it from our children.
The world needs energy, and our job is to provide it responsibly.
数字排斥是我们这个时代最大的不平等之一。
解释:第一次击鼓能振作士兵们的勇气,第二次击鼓可以使士兵们的勇气低落,第三次击鼓士兵们的勇气就消失了。