UV

Children should have glasses which filter out UV rays.

孩子们应该佩戴可以滤除紫外线的眼镜。

A special material on the surface receives UV light from the sun.

表面的一种特殊材料接收来自太阳的紫外线。

Tenith Adithyaa, a teenager from India, used UV to make the leaves stay fresh for a year.

来自印度的青少年 Tenith Adithyaa 利用紫外线使这些叶子保持新鲜一年。

The absence of oxygen on other planets means that those planets lack an ozone shield to protect life forms against UV radiation.

其他行星上没有氧气，这意味着这些行星缺乏保护生命体免受紫外线辐射的臭氧层。

Complex life evolved on the Earth´s surface, but not on Mars or other planets in the solar system because on those planets, early surface life was killed by UV radiation.

复杂的生命在地球表面进化，而不是在火星或太阳系的其他行星上，因为在那些行星上，早期的地表生命被紫外线杀死了。