交换、交易和互换的倾向普遍存在于所有人之中,而在其他动物种族中找不到。
Sustainability starts with respecting the wisdom of traditional farming while innovating for tomorrow.
The pursuit of mathematical knowledge is a journey that never ends; there is always more to discover and understand.
预测未来的最好方法就是创造它。
最有效的政策是那些能协调个人和集体利益的政策。