以下为句子列表：
英文: They chose a bovine rotavirus because it grew well in culture and was thought to be naturally attenuated in humans.
中文: 他们之所以选用牛的轮状病毒，是因为该病毒株在培养皿中生长良好，而且他们认为牛的病毒对人的毒性不强。
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英文: Though wheellike in cross section, rotavirus is actually a three-layered sphere containing 11 segments of double-stranded RNA, each of which consists of a single gene encoding a protein.
中文: 虽然轮状病毒的横切面呈车轮状，实际上其球面拥有三层构造，中间含有11段双股RNA，每段含有一个携带某蛋白质编码的基因。
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英文: Using a mouse pup model of rotavirus infection, the scientists demonstrated efficient binding of the VHH antibody fragments to rotavirus,resulting in a significant reduction in rotavirus infection in cell cultures.
中文: 选用轮状病毒感染的幼鼠模型，以证实“VHH抗体片断能有效与轮状病毒结合”，细胞培养结果显示有轮状病毒显著意义减少。
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英文: Vaccine developers quickly focused on live but weakened, or attenuated, strains of rotavirus that could be administered by mouth, without needles.
中文: 没有多久，疫苗研发人员就把目标锁定在毒性减弱但仍存活的轮状病毒品系，可用口服方式接种，而无需注射。
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英文: Typical rotavirus particles were seen with direct electron microscope. Polyacrylamide gel electrophoresis (PAGE) of its dsRNA genome showed its RNA electropherotype was 4:2:3:2 which accords with the electropherotype of guoup A rotavirus.
中文: 病毒核酸的聚丙烯酰胺凝胶电泳(PAGE)表明：其电泳型为4：2：3：2型，属于A群轮状病毒。
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