太阳开始落山了，金色的光芒斜射进树底。两人就在这时分别了。

The sun was beginning to set and sending deep gold-colored rays slanting under the trees when they parted.

youdao

雨停了，太阳开始出来了。

It stopped raining and the sun began to shine.

youdao

又过了一个小时，我看到太阳开始从远方升起。

Another hour and I see the sun starting to come up in the distance.

youdao

Because it came from optics, you know, rays of sunlight and so on And in fact, even when we first started pulling synthetic fiber, the first synthetic fiber cellulose was referred to as ray on, because it looked like a ray that was being pulled.

因为它源自光学，比如太阳光线等等,实际上，及时当我们首先开始抽出,人造纤维，第一根人造纤维的纤维素,叫做光线，因为那条在被抽出的纤维素,看起来像是一道光线。

麻省理工公开课 - 固态化学导论课程节选