把这一句，留给此刻的你
In the span of my own lifetime I observed such wondrous progress in plant evolution that I look forward optimistically to a healthy, happy world as soon as its children are taught the principles of simple and rational living.
在我有生之年，我目睹了植物进化的惊人进步，我乐观地期待着一个健康、快乐的世界，只要孩子们学会简单而理性的生活原则。