It produces t cells responsible for fighting off disease, and is adversely affected by stress.

它产生T细胞负责抵抗疾病和抵消压力影响。

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The countless books and news articles about cancer-fighting foods might lead you to think you can ward off this dreaded disease simply by eating better.

有关抗癌食品的书籍和新闻文章不计其数，也许你会认为，吃的好就能避免患上可怕的癌症。

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"Everything we already know about fighting off chronic disease, like getting sufficient sleep, staying active throughout life, and having a healthy diet" may stave off premature aging of the immune system, too, Epel said.

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As well as fighting off cancer and heart disease, vitamin A has also been linked to preventing macular degeneration, and eye condition that can lead to blindness.

BBC: Tomatoes