all these things are necessary.

所有的一切都很重要的
I'll give you two examples of the green revolution in action,

我会给你们两个绿色革命实际行动的例子
and we'll talk about some of the consequences of these.

并且我们会讨论到其中的一些结果
One would be a technology advance which is the use of irrigation,

其中之一就是运用于灌溉系统的科技进步
higher use of irrigation,

导致更高效率的灌溉
and then we'll talk about biotechnology and genetically modified foods.

然后我们会讨论生物高科技和转基因食物
It's a very interesting issue.

这是个非常有趣的问题
We'll come back in a later class and loop back to some of the concerns

我们一会儿的课会回到那些对于
about the genetic modification of food,

转基因作物的忧虑
but for the most part today,

但是今天的大部分时间
we'll talk about the upside that is part of the green revolution.

我们会讨论绿色革命的有利面
The early technology advances that have been made,

早期的科技发展做到了