土壤记得我们遗忘的事:尊重它,它将回报子孙后代。
The soil remembers what we forget: respect it, and it will repay generations.
数学家研究纯数学不是因为它有用;他研究它是因为他喜欢它,他喜欢它是因为它美丽。
The balance between economy and ecology is the core of modern forestry.