These early ancestors of modern Eurasians disperse into parts of the world that had more seasonal sunshine and much lower levels of sun radiation.

这些现代欧亚混血儿的早期祖先分散到世界各地，那里有更多的季节性日照和更低水平的太阳辐射。

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The roofs protect the floor-to-ceiling glass from direct sun radiation.

屋顶可以保护落地玻璃免受太阳的直接辐射。

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It says ultraviolet radiation from the sun can reach you on cloudy days, as well as bright and sunny ones.

VOA: special.2010.07.06

Another was a set of special instruments that helped measure the effects of the sun's radiation on the outside of the aircraft.

VOA: special.2010.07.07

The main cause of skin cancer is ultraviolet radiation from the sun.

VOA: special.2010.07.06

Solar energy can, of course, be gathered on Earth, but only about half of the sun's radiation ever makes it to the Earth's surface--the rest is either absorbed by the atmosphere or reflected back by clouds.

FORBES: Galactic Gold Mine?

The basic concept is the same as that underpinning the "white roads" idea -- the development of a technology that can reflect a proportion of the sun's radiation away from the earth's surface and back out into space, thereby cooling the atmosphere and slowing, or even reversing the damaging effects of global climate change.

CNN: The shield of Ra: Could solar reflection save the planet?

Changes in the amount of ultraviolet radiation from the Sun affect the ozone layer.

BBC: Viewpoint: The Sun and climate change