The body has natural defence mechanisms to protect it from disease.

人体对疾病具有先天性防御机制。

《牛津词典》

Intestinal mucosal immune system is the first line of defence that prevents animal body infection. It also is an important composition of whole animal body immune system.

肠道黏膜免疫是动物机体防止感染的第一防线，是整个动物机体免疫系统的重要组成部分。

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Normally the body USES its defence or immune system together with inflammation to control infection.

人体正常地用它的防御或免疫系统和炎症一起控制感染。

youdao

DNA. Of course, exercise is not actually bad for cells and the reason is that the body activates defence mechanisms which overcompensate for the stress the exercise creates, producing beneficial effects.

ECONOMIST: How to live longer��maybe

Meanwhile, North Korea's new leader Kim Jong-un has been appointed "first chairman" of the country's top decision-making body, the National Defence Commission, state media say.

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South Korean defence officials say the main body of the rocket has now been moved to the launch site in preparation.

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