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9、It Originated In China
它起源于中国
Researchers have successfully traced the presence of bubonic plague back to its origins in China, more than 2,600 years ago.
研究人员成功地将鼠疫的历史追溯到中国--它的起源地，大约2600年前
Different strains of the plague have different bacterial structures. By looking at each strain’s distribution, researchers have traced bubonic plague backward along the Silk Road, isolating 17 different bacterial strains. All these mutations trace back to a single type of bacteria that only started spreading outside of China in the last six centuries, carried by rats on ships leaving Chinese ports.
不同的瘟疫的不同菌株具有不同的细菌结构。通过观察不同的瘟疫，研究者将黑死病追溯丝绸之路上，隔离17种不同的菌株，这些变异种都来源于一种细菌，这种细菌在最近六个世纪里只在中国传播过，通过在中国船上的老鼠传播到世界各地
In 1409, ships carried the plague into East Africa. It also spread outward both east and west, through Europe and through Hawaii. It eventually came to the United States in the late 1800s after an epidemic swept through the Yunnan province.
在1409年，这些船带着瘟疫到了东非，同时在西部和东部传播，传播到了欧洲和夏威夷，最终在云南的一次爆发之后在1800年左右传播到了美国
