Well, a chemical called melanin has produced in our bodies gives the skin a darker color.

好了，一種叫做黑色素的化學物質在我們的身體裡產生了，讓皮膚呈現出更深的顏色。

The more people produce, the darker.

人越生產，越黑。

Their skin will be Melanie's purposes to work as a natural sunscreen to absorb the sun's UV rays.

他們的皮膚將是梅蘭妮的目的，作為一個天然的防晒霜，吸收太陽的紫外線。

With that in mind, regional skin colors developed naturally as a response to different climates.

考慮到這一點，地區性的皮膚顏色是隨著不同的氣候而自然發展起來的。

When our ancestors migrated across the globe.

當我們的祖先在全球範圍內遷徙的時候。

Tropical climates provided MAWR UV exposure than other regions.

熱帶氣候比其他地區提供MAWR紫外線照射。

However, too much exposure is damaging.

然而，過多的曝光是有損害的。

This means natives from regions like the equator had darker skin, since their bodies produce more melanin to protect against these harmful rays.

這意味著來自赤道等地區的土著人的皮膚更黑，因為他們的身體會產生更多的黑色素來抵禦這些有害射線。

On the other hand, too little UV light is also damaging because UV light provides vitamin D, which is essential to build our bones.

另一方面，過少的紫外線也是有損害的，因為紫外線可以提供維生素D，而維生素D是構建我們的骨骼所必需的。

Therefore, natives from cooler regions north and south of the equator often had lighter skin as a result of less UV exposure.

是以，來自赤道以北和以南涼爽地區的土著人，由於受到的紫外線照射較少，皮膚往往較淺。

Since they produced less melanin toe block UV rays.

由於他們產生的黑色素較少，以阻擋紫外線。

This ensured they received the vitamin D they needed.

這確保了他們獲得所需的維生素D。

It's important to note that diet also plays a role in the development of skin tones for example, a high seafood diet provides an alternate source of vitamin D.

需要注意的是，飲食對膚色的形成也有一定的作用，例如，高海產品飲食可以提供維生素D的替代來源。

That's why native people from Alaska and Canada remained dark skinned in low UV areas.

這就是為什麼阿拉斯加和加拿大的原住民在低紫外線地區仍然保持黑皮膚的原因。

All in all, the variation in our skin tones is on Lee due to a little natural sunscreen, Though we may not look alike.

總而言之，我們膚色的變化是李由於一點天然的防晒，雖然我們可能不一樣。

We are all human, and together we share our world.

我們都是人，我們一起分享我們的世界。