Name: 為什麼我們會有雀斑？| 雀斑 (Why do we get freckles? | #aumsum)
Uploaded: 2021-01-14T08:10:43.000Z
Duration: 1 min 10 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

轉承詞

Melanin is a pigment produced by cells called melanocytes in our skin.

Besides giving color, melanin also acts as a natural defense against the sun's harmful ultraviolet radiation.

When we are in the hot sun, our skin which
is exposed to the sunlight activates its melanocytes.

Melanin absorbs the ultraviolet radiation,
thus protecting us and in due course, darkening the skin.

However, in some people, this melanin is not produced evenly.

This means some parts of their skin produce more melanin as compared to other.

Thus creating small dark patches on their skin called freckles.

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為什麼我們會有雀斑？| 雀斑 (Why do we get freckles? | #aumsum)

absorb

cause

compare

create