And I'm a natural source of light.

我是自然的光源。

Nuclear radiation comes from natural sources, like radon, a gas which seeps up from the ground.

核辐射来源于自然物质，例如氡，一种从地下渗出的气体。

Blue agriculture' farms fish or water plants in natural sources of water such as oceans or lakes.

“蓝色农业”在海洋、湖泊等自然水资源环境下养殖鱼类或水生农作物。

That had so far been noted were most likely related to trauma from a non natural source.”

到目前为止，人们已经注意到这很可能是非自然来源的损伤。

Fortunately, acute exposures are rare, but we are exposed daily to lower levels of ionizing radiation from both natural and man-made sources.

幸运的是，急性暴露很少见，但我们每天都暴露在较低级的电离辐射下既来自于自然，也来自于人造物质。

But again, there aren't too many natural sources of X-rays on Earth.

但同样， 地球上没有太多的自然 X 射线源。

Historically, textile dyes were made from such natural sources as plants and animal excretions.

从历史上看，纺织染料是由植物和动物排泄物等天然资源制成的。

Decreasing demand for meat and fish, both good natural sources of iodine, is also having an effect.

减少对肉类和鱼类（两者都是碘的良好天然来源）的需求也产生了影响。

But I think this is slowly changing as more designers and companies are developing materials from natural sources.

但我认为随着越来越多的设计师和公司从自然资源中开发材料，这种情况正在慢慢改变。

The basic idea behind SETI is to look for distinctive radio-frequency emissions that might come from advanced aliens rather than natural sources like stars.

寻找地外智慧的基本想法是寻找来自高级地外生命而不是其他自然来源如恒星的射频信号。

And probably what we are used to. It has also got a little bit, a tiny, tiny bit of hazelnut flavouring from natural sources.

可能也是我们习惯的口味。它也有一点，一点点，一点点来自天然来源的榛子调味品。

And they join the estimated 570 million tons of methane emitted by other anthropological and natural sources each year.

据估计，每年其他人类和自然资源排放的甲烷量为 5.7 亿吨。

But more than 3,000 years before we learned how to make it, doctors were using its original natural source, willow bark, as a medicine.

但是在我们学会如何制造它之前的 3000 多年里，医生们使用它作为药物最初的天然来源是柳树皮。

Some sneaker tops are made from natural sources like leather, but tanning this material relies on chromium; a carcinogenic chemical that can damage freshwater ecosystems.

有一些运动鞋的鞋面是由皮革等自然资源制成的，但是需要依靠铬为材料进一步上色，而铬是一种能够破坏淡水生态系统的致癌化学物质。

To be clear, even if the sugar being added comes from a natural source like sugar cane or honey, it's still considered an added sugar.

要注意，即使加入食物的糖类本身是天然糖，例如甘蔗和蜂蜜，它们仍被看作是添加糖。

When crop circles first received their widespread popularity in the 70s and 80s, these natural sources of the unknown were understandably exciting, and even a bit menacing.

在七八十年代，第一个麦田怪圈受到广泛关注，这些大自然的未知力量自然令人兴奋，甚至有点吓人。

This gas is emitted by natural sources like wetlands, but is also emitted by human activities like coal mining, landfills, and raising livestock.

这种气体由湿地等自然资源排放，但也由采煤、垃圾填埋场和饲养牲畜等人类活动排放。

Back before grocery stores and fancy cake recipes, if you wanted to make your bread rise, you needed leavening agents from natural sources.

回到杂货店和精美蛋糕食谱之前，如果你想让你的面包发起来， 你需要天然来源的发酵剂。

Dyes used for coloring yarns and lengths of textile were derived from natural sources indigenous to the region and also available via silk road trade.

- 用于着色纱线和纺织品长度的染料来自该地区的天然来源，也可以通过丝绸之路贸易获得。

Surprisingly enough now, though, to have much more natural sources in the grid, because of their complementarity, we are much less dependent on weather variability.

然而，令人惊讶的是， 现在电网中拥有更多的自然资源，由于它们的互补性， 我们对天气变化的依赖要少得多。