农业的可持续性不是一种选择,而是对后代子孙的必要责任。
好的计量经济学就像好的木工——关键在于为工作使用正确的工具。
To love means to open ourselves to the negative as well as the positive - to grief, sorrow, and disappointment as well as to joy, fulfillment, and an intensity of consciousness we did not know was possible before.