We must listen to the science and act with urgency to address global energy challenges.
The past is what you remember, imagine you remember, convince yourself you remember, or pretend you remember.
我们必须接受失望,因为它是有限的,但千万不可失去希望,因为它是无限的。
Your  biggest  competior is yourself.
Once you understand how to write a program get someone else to write it.
Hope is the thing with feathers that perches in the soul.
Time is a slippery thing: lose hold of it once, and its string might sail out of your hands forever.