But Newton's law is-- You see, you've got to go back and wipe out everything you know.

但牛顿定律是,如你所知的,你必须回到过去,忘掉你所知道的一切

耶鲁公开课 - 基础物理课程节选

That meant that people growing corn were less-- less vulnerable to having things wipe out entire crops because there were different types of crops planted around the world, so the world corn supply would never be threatened by anything.

也就是说只要人们种植玉米,整个粮食体系就不可能那么轻易被摧毁,由于世界各地种植着不同品种的玉米,世界玉米供应不会受到任何影响

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选