来自《耶鲁大学开放课程：1600年后西方社会的流行病 第10集 第10集》
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The endemic home of cholera,霍乱的起源地是 -
as I've said, was the Indian subcontinent,我之前说过的印度次大陆 -
in the delta, the Ganges and Brahmaputra Rivers.在恒河和雅鲁藏布江的三角洲区域 -
And it was confined there until a number of developments在那片区域发展之前 -
enabled it to spread.霍乱一直没有向外传播 -
The bacterium that causes cholera is extremely delicate霍乱病毒非常脆弱 -
and doesn't travel so easily.不易于传播 -
So, it required a number of factors that enabled the disease所以需要一系列的条件使得 -
to move beyond its original area of endemicity.霍乱病毒传播到它的最适区域之外 -
What were some of those? One was colonialism itself,这些条件是什么呢 第一个是殖民政策 -
which meant large-scale troop movements也就是大量的军队流动 -
and increasing contact between the subcontinent这使得次大陆和世界其他地方的