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The discovery that I soon made that the guinea pig was also susceptible to infection made it possible for me, from the third year on, to preserve the virus on this animal.
我很快发现,豚鼠也容易感染,这使我从第三年开始,能够在这种动物身上保存病毒。
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16 种意境 · 9:16 竖屏 · 1440 × 2560 高清图片