例句與造句

1. Although Jenner had used cowpox virus, a third virus, vaccinia, became the standard vaccine against smallpox.
2. Hiding from the infected population in the desert, Rick makes a third virus to try and undo all the previous ones.
3. G . B .'s thawed blood was injected into tamarins again, and from them the Abbott scientists found two viruses, G . B .-A and G . B .-B . A third virus, G . B .-C, was discovered from further tests on other blood samples.
4. It's difficult to find third virus in a sentence. 用third virus造句挺難的