But in this case the bacterial and viral DNA were the stars of the show.

但在这项研究中，细菌和病毒DNA是主角。

Khalili and his team of scientists appear to have found a way to cut this viral DNA from infected people's cells.

哈利利和他的科学家团队似乎发现了一种从人体细胞中剔除这种病毒DNA的办法。

If CRISPR couldn't distinguish between bacterial and viral DNA, it wouldn't be a very useful defense system.

如果CRISPR无法区分细菌和病毒DNA，那么它就不是一个非常有用的防御系统。

If the virus invades again, the scout complex recognizes it immediately, and Cas9 swiftly destroys the viral DNA.

如果病毒再次入侵， 侦察复合体会立即识别，Cas9 会迅速破坏病毒 DNA。

The cas enzyme then cuts the viral DNA in two, preventing it from replicating, and therefore, protecting the bacterium.

然后，cas 酶将病毒 DNA 一分为二， 阻止其复制，从而保护细菌。