这个世界不是因为你能做什么,而是你该做什么。
Sustainability isn't a choice anymore - it's our responsibility to future generations.
写作没有什么秘诀。你所要做的就是坐在打字机前,然后流血。
Success in life means doing that thing than which nothing else is more dear to you.
现代采石场管理需要地质学家的眼睛、工程师的双手和诗人的心灵。
The pursuit of mathematical truth is a never-ending adventure.