The CRISPR elements are part of a prokaryotic defence system directed against external attacks by e. g. viruses and may be viewed as a simple immune system of microorganisms.

CRISPR是原核生物免疫防御系统的组成部分，能帮助原核生物抵抗入侵的病毒，可看作是一个简单的微生物免疫系统。

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Some tumor cells (e. g., t lymphoma EL4 cells) express CD47 and block phagocytosis of phagocytes in order to escape from the surveillance of immune system.

一些肿瘤细胞譬如T细胞淋巴瘤el 4细胞等也表达CD 47分子，抑制机体吞噬细胞功能逃逸免疫系统的免疫监视。

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Vitamin E helps maintain healthy blood vessels and promotes heart health. Vitamin E also supports the immune system.

维生素E能帮助维持血管健康，促进心脏健康。维生素E也能支持免疫系统的健康。

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