That meant that people growing corn were less--

也就是说只要人们种植玉米
less vulnerable to having things wipe out entire crops

整个粮食体系就不可能那么轻易被摧毁
because there were different types of crops planted around the world,

由于世界各地种植着不同品种的玉米
so the world corn supply would never be threatened by anything.

世界玉米供应不会受到任何影响
As we'll talk about later in the class,

像我们后面所要提到的
the biodiversity has shrunk so what used to be

玉米种群的生物多样性已经从曾经的
hundreds of varieties of corn is now just a few.

几百种减少到了现在的几种
As I'll explain later in class,

稍后我会详细解释
in Florida there used to be many, many, many varieties of oranges

在佛罗里达州曾经有很多种类的橙子
and now there are about four

而现在那里大概仅剩四种
and there are commercials reasons for this occurring.

这一切的发生归咎于商业上的原因
The biodiversity has shrunk for various reasons of profitability

生物多样性的减少源自利益的驱动