Studies have shown that rudeness spreads quickly and virally, almost like the common cold.

研究表明，无礼能够像感冒一样迅速并且疯狂地传播。

His branding of United Russia as “the party of crooks and thieves” has spread virally.

他给俄罗斯统一党取的绰号“骗子小偷党”流传甚广。

Neighboring villages saw the fishing boom and drew up their own closures, spreading the model virally along hundreds of miles of coastline.

邻近的村庄看到了渔业的繁荣并制定了自己的禁渔令，将这种模式传播到数百英里的海岸线上。

And I just built it as something for me and a few dozen people that I worked with to use, but it grew virally within Google.

我只是将它构建为我自己以及与我一起工作的几十个人使用的东西，但它在谷歌内部迅速发展。