Any differences between them—one twin having younger looking skin, for example—must be due to environmental factors such as less time spent in the sun.

他们之间的任何差异（例如，双胞胎中有一个的皮肤看起来更年轻）一定是由于环境因素导致的，如在阳光下呆的时间更少。

youdao

Look, everybody is looking at the sun!

快看，大家都在看太阳呢！

youdao

I climbed to the top of a small rise and realised that the mist was little more than a few feet deep, and though it was only a short climb, I found myself completely above it and looking at a wonderfully clear view of Skiddaw with the sun setting in the west.

我爬到一个小山坡的顶部，发现薄雾只有几英尺深，虽然只是小段的攀登，但我发现自己完全位于雾气的上方，伴着夕阳西下，我看到了斯基多峰非常清晰的景色。

youdao

The owner of Sun Records, Sam Phillips,had been looking for a white performer who could sing black rhythm and blues.

VOA: special.2010.04.04

Since it is such an important part of diets around the world, researchers like Qi Sun are now looking at its relationship to chronic disease.

VOA: standard.2010.06.25

Looking at the sun with the naked eye can cause blindness.

CNN: Upcoming solar eclipse to project 'ring of fire'

While it is no more dangerous than looking at the sun (which itself is not a good idea), the relative dimness is likely to tempt people to stare at the eclipse for too long, damaging their eyes.

CNN: HE GODS WERE DRINKING

But astronomers have figured out a clever way for Hubble to "observe" the effects of the transit on the light from the sun: by looking at the moon.

CNN: A transit of Venus, an age of wondrous science