source of light

基本解释

But Mars is much closer than the distant stars and an extended source of light.
不過火星比遙遠的恒星距離我們更近，光源也更爲擴展。
The invention of the laser provided scientists with a stronger source of light and a push that could do useful work on Earth.
激光的發明給科學家們提供了一種強大的光源，同時也是地球上的一種能夠産生有傚功的推力。
The scintillation is more pronounced because the star is effectively a point source of light seen as a narrow bundle of light rays.
閃爍是更加常見的說法，因爲恒星事實上是一個點光源，看起來像是一束窄光線。

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.
強度，如果我們增加強度，我們增加的不是,每個光子的能量，我們增加的僅僅是,從我們激光源射出的光子數，無論我們的光源是什麽。
麻省理工公開課 - 化學原理課程節選

Junior Seau was a source of light and life until injuries from football snuffed that out.
FORBES: When Playing Football Leads to Death
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.
ENGADGET: Green House's lantern runs on salt and water, powers your gadgets via USB