extended source

基本解释

The figure shows the path of one ray from a point A of an extended source.
图显示出，一条来自于扩展光源A点的光线。
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。
In this paper, we discussed the time-dependence of the static solution of SU(2)and SU(3)gauge theory at the presence of static extended source.
本文我们讨论有静态外源时SU（2）和SU（3）规范场静态解的时间依赖关系。

But does the source material suit an extended franchise?
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