这是用来阻挡太阳直射光线的。

This was intended to exclude the direct rays of the sun.

《柯林斯英汉双解大词典》

youdao

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And J.J. Balmer in 1885 playing with the numbers asociated with the lines there, you notice how the lines are colored?

885年，巴尔末,开始把光线与数字联系起来，你注意过光线是怎样被赋予颜色的吗？

麻省理工公开课 - 固态化学导论课程节选

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 these rings are indicative of the crystal structure of nickel and can be explained only by invoking wavelike properties of light.

这些光圈,表明了了镍的晶体结构,而且只能通过,光线中波的特征来解释。

麻省理工公开课 - 固态化学导论课程节选