俗话说“条条大路通罗马”，背诵
Jupiter's Great Red Spot is its particular crimson(深红色的) shade because of the interaction of ultraviolet(紫外线的) light and specific chemical compounds in the gas giant's atmosphere. Lee Billings reports
When I say “Jupiter,” (木星) what comes to mind? Chances are, you pictured a banded orb of gas marked by a big red oval(椭圆形), the giant planet’s Great Red Spot.
Scientists have long known that the Great Red Spot is a huge whirling(漩涡的) storm rising high above the surrounding cloud tops. But the reason for its reddish(微红的) hue(色彩) has been a mystery. One leading theory has been that red-colored compounds are swirling up from deeper down to tint the Spot, a bit like the blush(脸红) from blood rushing to your cheeks. Now, new results presented at recent meeting of the American Astronomical Society are suggesting something different.
Working at the NASA/Caltech Jet Propulsion Lab in Pasadena, California, researchers exposed two chemicals known to exist in Jupiter’s(木星) atmosphere—ammonia(氨) and acetylene(乙炔)—to levels of ultraviolet light like those found near the top of the planet’s atmosphere. The ammonia(氨) and acetylene(乙炔) turned a shade of red very similar to the Great Red Spot’s, as seen up-close by passing spacecraft(宇宙飞船).
But the lab compounds only matched the Spot’s color if on Jupiter they were confined to its highest cloud tops. If they were welling up from beneath and distributed through all of the Spot’s layers, the Spot would be a much more brilliant crimson hue than its present pale red color.
So it looks like UV light's effect means that Jupiter’s Great Red Spot is less like a blush—and more of a sunburn.
下面是这篇文章中的疑难词汇完整的词义：
Crimson n. 深红色adj. 深红色的vt. 使变为深红色;脸红vi. 变为深红色;脸红
Ultraviolet adj. 紫外的;紫外线的n. 紫外线辐射，紫外光
Jupiter 木星
Hue n. 色彩;色度;叫声
Acetylene n. [有化] 乙炔;电石气
Sunburn n. 晒黑;[皮肤] 晒斑vi. 晒伤皮肤;晒红皮肤;晒黑皮肤vt. 晒伤;晒黑;晒红
Ammonia n. [无化] 氨，阿摩尼亚