Paraphrasing (12th paragraph)

Text

While job losses in most states are modest relative to the size of the economy, the promise of new jobs was the principal justification for NAFTA and the WTO. According to the agreements'promoters, the predicted new jobs would compensate for the increased environmental degradation, economic instability, and public health dangers that the agreements would bring, If NAFTA and the WTO have not delivered net new jobs, they cannot provide enough benefits to offset the costs imposed on the American public.

The main idea of the paragraph

If NAFTA and the WTO have not delivered net new jobs, which was the justification of their creation, they cannot provide enough benefits to offset the costs imposed on the American public

如果北美自由贸易协定的实施和世界贸易组织的建立没有创造更多的就业机会,而那又正是建立那些机构的理由,它们也就不能够提供足够的好处来抵消建立并参与这些机构而使美国公众蒙受的损失。