What America do we see? I'm going to look back to a passage I talked about in a different vein last time, on 26 and 27, just for one quick example.
看到什么了呢?,我们看到了什么样的美国?,我想回到,上一次讲另一个脉络时讲到的段落,在26到27页。
We'll be dealing with this in some depth, but I'll give you one quick example.
在以后的课里我们也会讨论到这个问题,但现在我可以先给你们一个小例子。
OK. So there's one quick example.
好,我们很快的看完了一个例子。
You could do the same thing in mammals and here's one quick example of that, using a different kind of a vector, but inserting a gene into the fertilized egg of a mammal, in this case, a sheep.
你也能在哺乳动物上做到同样的效果,这里有另一个简短的例子,用了另一种载体,把一段基因注入哺乳动物的受精卵中,在这里我们用了绵羊
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