The only way to learn mathematics is to do mathematics.
Hold to the now, the here, through which all future plunges to the past.
学习数学的唯一方法就是做数学。
不要看时钟,做它该做的事。继续前进。
没有野生动物的森林就像没有音乐的交响乐。
Every year of delay makes the problem harder to solve.
Sustainability isn't a trend; it's the future of food production.