We must balance economic growth with ecological preservation—there's no other option.
我不担心别人怎么想，我只是出去尽我所能。
A method of solution is perfect if we can foresee from the start, and even prove, that following that method we shall attain our aim.
知识的增长是解决问题的关键。
The hardest part of any challenge is taking the first step.
The truth is rarely pure and never simple.
Do not be avaricious； do not be a recluse.