健康的森林生态系统同时支持自然和商业。
真正的挑战不仅是要养活世界,而且要以可持续的方式滋养它。#
History is, above all else, the creation and recording of that heritage; progress is its increasing abundance, preservation, transmission, and use.
The art of doing mathematics consists in finding that special case which contains all the germs of generality.