第一段：

With an abundance of low priced labour relative to the United States. It is no surprise that China, India and other developing countries specialize in the production of labour intensive products. //(2) For similar reasons, the United States will specialize in the production of goods that are human and physical capital intensive because of the relative abundance of a highly educated labour force and technically sophisticated equipment in the United States.

这个首段很明显是直入主题式的。一开始已经有明显的话题词。这段话的中间的短语 “for similar reasons” 说明短语前后句子的关系是平等的， 因此都需要概括出来，我们可以用一个对比或者让步的从句把句子连接起来， 由于后文还有其他的信息， 而这两句的意思又相对明确， 因此在句末可添加“；” 或者“, and” 方便接后面的句子。

Developing countries specialize in production of labour intensive products, while United states specialize in the human and physical intensive product;/(, and)

第二段：

(3) This division of global production should yield higher global output of both types of goods than would be the case if each country attempted to produce both of these goods itself. (4) For example, the United States would produce more expensive labour intensive goods because of its more expensive labour and the developing countries would produce more expensive human and physical capital-intensive goods because of their relative scarcity of these inputs. （5） This logic implies that the United States is unlikely to be a significant global competitor in the production green technologies that are not relatively intensive in human and physical capital.

句（3）中的“this” 是承接上文内容， 表明第二段是第一段的延伸。 句（3） 也是这一段topic sentence, 可以直接取其意思。 后文从for example 其都是对topic sentence 的解析，可以省略。 这一段取句（3）的前半句即可。 因为第一二段已经讲完一个意思了 ，因此可以用‘；’ 来暂时停顿句子。

such division of global production should yield higher global output; 

第三段：

（6）Nevertheless, during the early stages of the development of a new technology, the United States has a comparative advantage in the production of the products enabled by this innovation. （7）However, once theses technologies become well understood and production processes are designed that can make use of less skilled labour; production will migrate to countries with less expensive labour.

第三段句首的连接词有带来新的转折关系， 这个转折是对前面两个段落的转变，因此需要独立概括。 句中的however, 又带出另一层意思， 因此也要概括。

句（6）应概括为：

the United States has comparative advantage in the production of new products enabled by innovation, but the production will migrate to developing countries when the production became well understood.