还有另一件事要加进来，这就是：当然我们知道中国是幅员辽阔，人口众多，在人口统计和地理上都是首屈一指，它有13亿人口。

And there’s one other thing to add to this, and that is this. Of course we know China’s big, huge demographicallyand geographically, with a population of 1.3 billion people.

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还有另一件事要加进来，这就是：当然我们知道中国是幅员辽阔，人口众多，在人口统计和地理上都是首屈一指，它有13亿人口。

And there's one other thing to add to this, and that is this. Of course we know China's big, huge demographically and geographically, with a population of 1.3 billion people.

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地理上和人口统计分布上的特色与H镇相类似的镇， 但却没有受到污染的， 并没有跟H镇一样有著高的的发病率。 表示真的事水污染导致才会这样， 支持。

Towns with geographic and demographic characteristics similar to those of Harborville but without polluted water do not have as high a rate of the disease as does Harborville.

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