例1
The extreme seriousness of desertification results from the vast areas of land and the tremendous numbers of people affected, as well as from the great difficulty of reversing or even slowing the process.
○Desertification is a significant problem because it is so hard to reverse and affects large areas of land and great numbers of people.
○Slowing down the process of desertification is difficult because of population growth that has spread over large areas of land.
○The spread of deserts is considered a very serious problem that can be solved only if large numbers of people in various countries are involved in the effort.
○Desertification is extremely hard to reverse unless the population is reduced in the vast areas affected.
例2
Importing the grain, which would have been expensive and time consuming for the Dutch to have produced themselves, kept the price of grain low and thus stimulated individual demand for other foodstuffs and consumer goods.
○ Buying imported grain led to the Dutch demanding that other foodstuffs and consumer goods be imported.
○ Because the Dutch were able to import inexpensive grain, they had money available to create a demand for other food products and consumer goods.
○ Keeping the price of grain low was a primary goal of the Dutch at a time when they could not produce enough grain to provide for all their needs.
○ The demand for ot
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