source of light

基本解释

But Mars is much closer than the distant stars and an extended source of light.
不过火星比遥远的恒星距离我们更近，光源也更为扩展。
The invention of the laser provided scientists with a stronger source of light and a push that could do useful work on Earth.
激光的发明给科学家们提供了一种强大的光源，同时也是地球上的一种能够产生有效功的推力。
The scintillation is more pronounced because the star is effectively a point source of light seen as a narrow bundle of light rays.
闪烁是更加常见的说法，因为恒星事实上是一个点光源，看起来像是一束窄光线。

Intensity, if we increase the intensity, we're not increasing the energy in each photon, we're just increasing the number of photons that we're shooting out of our laser, whatever our light source is.
强度，如果我们增加强度，我们增加的不是,每个光子的能量，我们增加的仅仅是,从我们激光源射出的光子数，无论我们的光源是什么。
麻省理工公开课 - 化学原理课程节选

Junior Seau was a source of light and life until injuries from football snuffed that out.
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But while it lasted, work was a wellspring, a real source of light, the nurture of a beloved community.
NPR: Excerpt: 'Then We Came to the End'
More than just supplying a battery-free source of light, though, the lantern can function as a charger, thanks to a USB port built into the casing.
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