但没有这种自由，即随心所欲地支配我们所愿的一切。
But there is no such liberty as the power to dispose of what we please.
The signal of human influence on climate has emerged from the noise of natural variability.
我在数学上花费的时间越多，我就越感到兴奋。
The best fertilizer? A farmer's footsteps in the field.
他意识到，生活就像一首歌。开始时是神秘，结束时是确认，但中间是所有情感所在，使整个事情变得值得。