前三个值表明了光源的位置，在点光源的，或者方向光的方向情况下。

The first three values specify the lights position, in the case of a point light, or the lights direction for directional lights.

youdao

我们深深地关心着你们和你们通向光的道路并且会尽我们所能帮助你们。

We are deeply concerned about you and your path towards the light and will do all we can to help you.

youdao

我们希冀有向光的趋势，但是我们不能冒险向暗的趋势，否则他们就赢了。

We would like to have the leaning towards the light, but we cannot risk the leaning towards the dark, or they win.

youdao

In our hallway, ablaze with welcoming lights, my Lolita peeled off her sweater, shook her gemmed hair, stretched towards me two bare arms, raised one knee. "Carry me upstairs, please. I feel sort of romantic tonight."

在自家的门厅里，欢迎的灯光大亮，洛丽塔脱下,套衫，摇摇晶光闪亮的头发，向我伸出两只裸露的胳膊，抬起一直膝盖：“请抱我上楼去，我觉得今晚有些,浪漫，“

耶鲁公开课 - 1945年后的美国小说课程节选