The true teacher defends his pupils against his own personal influence.
The future of agriculture lies in sustainable development. We must leave green mountains and clear waters for future generations.
You have to be whole to be happy.
可持续性不是一种趋势;它是我们对下一代的责任。
Our capacity to draw happiness from aesthetic objects or material goods in fact seems critically dependent on our first satisfying a more important range of emotional or psychological needs, among them the need for understanding, for love, expression and respect.