Mathematics is not a spectator sport; you have to play to understand.
数学不是观赏性运动,你必须参与其中才能理解。
仅仅那山学会下一而是不够的,种大需里当上如有阳光、自由,和一点花的芬芳。
我的存在是个永远的奇迹,这就是生命。
Climate change isn't a future threat - it's reshaping our fields today.
Sustainability isn't an option; it's a responsibility.