One example of a boundary condition is solar radiation.

边界条件的一个例子就是日射。

Only about 40% of solar radiation is visible to the eye.

太阳辐射中只有大约40%的光是肉眼可见的。

Solar radiation can be particularly dangerous to astronauts working outside in space.

太阳辐射对在太空外工作的宇航员来说尤其危险。

Way up in northern Canada which receives an equivalent solar radiation as Mars.

它接收太阳辐射是和在火星上的差不多。

This part of the planet gets more average solar radiation throughout the year.

这里的植物年均日照量比其他地区更高。

There is intense gravitational pull from the sun, as well as extreme solar radiation.

太阳对水星的引力作用很大，此外太阳辐射也很高。

The ice is bathed in ultra-violet light, simulating solar radiation, which breaks up the molecules.

冰沐浴在紫外线中，模拟太阳辐射分解分子。

Dark tightly curled hair is most effective at keeping solar radiation off of skin.

深色且极为卷曲的头发最能有效地防止太阳辐射照射皮肤。

So the white ones reflect incoming solar radiation and the red ones and the dark ones absorb it.

白色的会反射太阳辐射，红色的和深色的则会吸收辐射。

Without trees to provide shade, buildings absorbed up to nine times more solar radiation during deadly summer heat waves.

没有树木遮荫，建筑物在致命的夏季热浪中吸收的太阳辐射比平时多了近 9 倍。