所以它是一种损害免疫系统的传染性疾病。
Therefore, it is a damage to the immune system of infectious diseases.
如果我看到一群病患，这里有可能有传染病，那么我最好把自己的免疫系统再开高一个档。
If I see a bunch of sick people, maybe a big infection is around, and I better kick my immune system into high gear.
病毒已使他的计算机操作系统受到传染。
The virus has infected the operating system of his computer.
因为这些传染病在免疫系统健康的人群中是很少见的。
These infections are unusual in people with a healthy immune system.
牙龈和牙齿的传染病会释放细菌进入血液系统。
Infections of the gums and teeth can release bacteria into the blood system.
定期进行智能升级，有助于保护系统不受新型恶意软件的传染。
By running Smart Update regularly, you can help keep your system free of new infections.
定期进行智能升级，有助于保护系统不受新型恶意软件的传染。
By running Smart Update regularly, you can help keep your system free of new infections.
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