教育者必须是一位心理学家,以便理解儿童。
I'm not going to let anyone else's opinion of me define who I am.
Sustainability isn't an option—it's a necessity for the future of agriculture.
释义:观察天下的造化之道,四季周而复始不变,圣人能够体认到这种玄妙的道理并用以教化众生,从而为人民所使用。
The greatest problem for mathematicians now is probably the Riemann Hypothesis.