Ultraviolet radiation from the hot star powers the nebular glow.

热恒星的紫外辐射使星云发光。

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The molecules emit the infrared light that they have absorbed ultraviolet radiation from the star or have been heated by the wind from the star.

氢分子发出红外线的原因是它们吸收了恒星发出的紫外线，或者是受到了恒星喷发的炽热气体流的加热。

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Ionized molecular hydrogen can be seen evaporating from the tips of these star-forming columns of gas and dust, under pressure of ultraviolet light from the nebula's central blue giant stars.

在来自星云中心蓝巨星紫外线辐射的压力下，这些由气体和尘埃组成的恒星形成区域尖端的电离氢分子将不复存在。

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His weapon: a rolling, 3-foot-tall machine (think R2-D2 from Star Wars) called the Xenex that bathes hospital rooms with intense, millisecond pulses of ultraviolet light from a high-wattage strobe light.

FORBES: How A New Machine Uses U.V. Rays To Blast Killer Bacteria