a ray of light

基本解释

When a ray of light encounters a boundary, such as that between air and water, its speed changes; so does its angle of travel.
当一束光线遇到一个界面，如空气与水之间的界面，光的速度就会发生改变，光的运动角度也就同样发生改变。
Add a bit of tweaking here and fine tuning there and its warm, radiant glow shines like a ray of light amidst ‘Contra’’s incessant glow.
这里修修、那里调调，成为这张温暖照人的‘Contra’中又一束耀眼的光线。
The fact that educated expatriates like the Moore sisters think of these youngsters in Liberia is a ray of light in this struggle, he adds.
他又说，像摩尔这样受过教育的海外侨胞能够关注这片土地上的这些小家伙们，这是这场战斗中的一抹阳光。

Finally,a single ray of light shot from out and fell full upon the vulture eye.
And what's interesting about this sun is it has a ray of light coming out of the top.
这幅画的有趣之处在于红日的光线从画面的顶端射了出来。
It's like 课堂 - SpeakingMax英语口语达人
And then,when my head was well in the room, I undid the lantern just so much that a single thin ray of light fell upon the vulture eye.

A. Points can always find a ray of light in the darkest clouds.
NPR: Points Wins The Houston Open