These infections are unusual in people with a healthy immune system.

因为这些传染病在免疫系统健康的人群中是很少见的。

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It also takes longer for a person with HIV to recover than it takes for someone with a healthy immune system.

同时他们恢复的时间也比具有健康免疫系统的人要长。

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Selenium is a mineral known to have antioxidant properties and to be involved in healthy immune system activity.

硒是一种矿物已知有抗氧化作用，将在健康的免疫系统活动的人。

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Our immune system's function is to keep us healthy in the face of an environment where there are lots of things that could potentially harm us.

我们免疫系统的功能就是保持自身健康,在面对危机四伏的环境时,使我们免受伤害

耶鲁公开课 - 生物医学工程探索课程节选

You may also get infections that a person with a healthy immune system likely wouldn't get (called opportunistic infections).

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Advocates of raw milk hold that pasteurization kills enzymes that make food digestible and bacteria that contribute to a healthy immune system.

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The HIV-infected partners started off with a moderately healthy immune system.

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