If a cell's defence mechanisms detect double-stranded RNA they destroy it, to protect against infection.

如果发现双链RNA就会迅速将其销毁，以保护机体免受病毒感染。

Some organisms use bioluminescence as a defence mechanism. Lighting up an attacker can make it more vulnerable to the attentions of others.

一些生物体利用生物光作为一种防御机制。照亮袭击者可以让它们不那么容易引起其他生物的注意。

When a person is ill, the body’s natural defence mechanisms come into operation.

【mechanism】生病时，人体内的自然防御机制就会开始工作。

When my parents got divorced is when I started using humour as a defence mechanism.

我父母离婚后我开始用幽默来自卫。

Sometimes I wondered if it was a defence mechanism, whether the only way to cope with his life was to pretend it wasn't him it was happening to.

有时我想知道这是否是一种防御机制，应对他生活的唯一方法是否就是假装这不是发生在他身上的事情。

It is believed that the molecule emerged as a defence mechanism against invasive bacteria, plant pathogens and — We humans and an Asian tree shrew are the only mammals in the world known to tolerate or even seek out capsaicin.

据称，辣椒分子能够防御入侵的细菌、植物病原体和-人类和一种亚洲树鼠是世界上已知的能耐受甚至寻找辣椒素的哺乳动物。