我们成功的真正衡量标准是我们为后代留下了什么。
The true measure of our success will be what we leave for future generations.
Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it.
可持续性不是一种选择;它是农业前进的唯一道路。