Exercise releases endorphins which are natural feel-good chemicals in the body.

运动可以释放内啡肽，这是一种让人感觉良好天然质。

Iodine is a mineral naturally rich in seaweed, fish, and seafood.

碘是一种富含海藻、鱼类和海鲜天然矿质。

Chemical recycling uses enzymes, natural chemicals which cause changes in other chemicals without being changed themselves.

回收用到酶，这是一种引起其他质变却不会改变自身天然质。

The mother-daughter team then mixes the bacteria with a natural algae-based substance, called a gel, and places it onto the paintings.

然后，母女团队将细菌与一种名为凝胶天然藻类质混合，并将其放置在画作上。

Beeswax is that natural substance that bees produce, right?

蜂蜡是蜜蜂产生天然质，对吧？

Now what are the properties of these chemicals, of these natural substances?

这些质、这些天然质性质是什么？

But they also discovered that this weird-looking fungusis synthesizing unique natural substances, mortiamides.

但他们也发现，这种长相真菌合成了一种独特天然质——mortiamides。

Endorphins are natural opiates made by your body.

内啡肽是人体产生天然鸦片类质。

The thing is, is titanium dioxide, it's a naturally occurring thing.

事情是这样，钛白粉是一种天然存在质。

So you're releasing pain, natural pain relievers, natural opioids.

于是你在释放疼痛，自然止痛质，天然类鸦片质。

Crude oil is a mix of complex hydrocarbons – substances found in oil, coal and gas.

原油是复杂碳氢合混合——存在于石油、煤炭和天然气中质。

And this step is essential to release the natural substanceswithin the lichen cell.

这一步对于释放地衣细胞内天然质至关重要。

And they began to figure out how to transfer magnetic properties to substances other than lodestone.

他们开始研究如何将磁性转移到除天然磁石以外其他质上。

It's found in something called gas hydrate and, believe it or not, that's a kind of ice.

它存在于一种叫做天然气水合质中，不管你信不信，那是一种冰。

Now, it probably doesn't hurt that the diamond is the hardest naturally occurring substance in the world.

现在，钻石作为世界上最坚硬天然质，这无疑为其长久保存提供了助力。

Don't eat potatoes and tomatoes. They'll kill you. Here, smoke this. It's 100% natural, organic substance. It's good for you. It's called tobacco. - thanks, doctor.

不要吃土豆和西红柿。它们会杀了你。来，抽这个。它是 100% 天然有机质。这对你有好处。这叫做烟草。- 谢谢医生。

This story starts with an element called Bromide, a natural substance that is harmless to humans and is formed in the water from salt.

这个故事始于一种称为溴元素，它是一种对人体无害天然质， 由水中盐形成。

With a rating of ten on the Mohs hardness scale, which measures the relative hardness of minerals, diamonds are the hardest known naturally occurring substance.

钻石莫氏硬度等级为 10 级（用于测量矿相对硬度），是已知最硬天然质。

I think that this idea that anything that's chemical, in air quotes, is dangerous and bad, and anything that's natural, in air quotes, is good for you.

我认为这种想法，即任何所谓质都是危险且不好，而任何所谓天然质都对你有好处。

The Search for Our Natural Energy-Burner Knowing the power of DNP to literally burn through our stored (fat) energy, scientists have for decades been striving to find its natural equivalent within our bodies.

寻找我们自身天然能量燃烧剂。了解DNP能够直接燃烧我们储存（脂肪）能量威力后，数十年来，科家一直在努力寻找我们体内与之相当天然质。