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1.This strain of bacteria is responsible for the common cold.
这种细菌是引起普通感冒的罪魁祸首。
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2.The study found that this strain had a higher resistance to antibiotics than others.
研究发现，这种菌株对抗生素的抵抗力比其他菌株要高。
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3. Researchers are trying to understand how this strain spreads from person to person.
研究人员正在试图了解这种菌株是如何从一个人传播到另一个人的。