Free vaccines are more valuable than expensive treatments, yet harder to promote.
The art of any culture is the exponent of its social relationships.
我梦到了我的儿子会成长为一个好人，一个拥有自由意志的人；我梦到了有一天，你会回到我们童年玩耍的这片土地，故地重游；我梦到了鲜花再次在街道上盛开……天空满是色彩斑斓的风筝!
A book is a garden, an orchard, a storehouse, a party, a company by the way, a counselor, a multitude of counselors.
唤醒天才的是困难。
Sustainability isn't an option—it's our responsibility to future generations.
数学中发现的快乐就像解开宇宙留给我们的谜题。