So about three billion years ago, bacteria evolved a defense mechanism to fight viral infection.

所以大约30亿年前，细菌进化出一种防御机制来对抗病毒感染。

Luckily though, the stomach also has some defense mechanism in place.

但幸运的是，胃还有一些防御机制。

Scientists think that bioluminescence could be a defense mechanism to help them escape predators.

科学家认为生物发光可能是一种帮助它们逃避掠食者的防御机制。

Snap decisions can be important defense mechanisms; if we are judging whether someone is dangerous, our brains and bodies are hard-wired to react very quickly, within milliseconds.

快速决策可以是身体重要的防御机制；如果我们是在判断某人是否是个危险人物，我们的大脑和身体会自发地在几毫秒钟内做出快速反应。

So, if a lucky seed does make it through all those defense mechanisms, could it sprout?

那么，如果一颗幸运的种子真的通过了所有这些防御机制，它会发芽吗？

It’s a defense mechanism… and a pretty powerful one.

这是一种防御机制… … 而且非常强大。

It's thought to be a defense mechanism used to scare away predators.

它被认为是一种防御机制, 用于吓跑掠食者。

And being complacent and accepting all these insanity may be a defense mechanism.

自满和接受所有这些疯狂可能是一种防御机制。

He's odd, yes, eccentric, but it's just a defense mechanism.

他是很奇怪，甚至有点古怪，但这只是他的防御机制。

Back of it all is a defense mechanism as ingrained as the color of his skin.

这一切的背后是一种防御机制， 就像他的肤色一样根深蒂固。

But you think it's just a defense mechanism against intensive therapy.

但是你认为这只是一种防卫机制在阻止你深入治疗。

The green color that forms on the skin is actually chlorophyll which isn't toxic but indicates the presence of the toxin solanine which is a defense mechanism against pests.

土豆皮上的绿色实际上是叶绿素，它是无毒的，但这表明了有毒素茄碱的存在，这是一种防御害虫的机制。

But the proposal here is to use this defense mechanism to protect our rivers, so we don't need to rehabilitate them.

但这里的提议是利用这种防御机制来保护我们的河流，所以我们不需要修复它们。

And he called these " defense mechanisms." You're defending yourself against the horrible parts of yourself and some of these make a little bit of sense.

他称这些为“防御机制”。你在保护自己免受自己可怕的部分的伤害，其中一些是有道理的。

Although no one knows for certain why they light up, scientists believe it to be a defense mechanism, to startle a predator away, or perhaps to attract another predator to eat their attacker.

虽然没有人确切知道它们为什么会发光，但是科学家认为这是种防御机制，用来吓跑捕食者或者可能吸引另一个捕食者来吃掉它们的攻击者。

As in the final case example in " The Patient's Defense Mechanisms, " the experience in therapy of trust and dependency is both a necessary and a highly feared development.

正如“患者的防御机制” 中的最后一个案例一样，信任和依赖治疗的经验既是必要的， 也是令人高度恐惧的发展。