The radius r--I'll give your light back because it may be nicer for you... The radius is 15 meters.

半径r，我把灯打开,便于你们听课。,半径是15米。

youdao

Ice crystals should be plate shaped. They float in the air close to the ground reflecting light back downwards.

冰晶需呈片状，它们悬浮近在地面的空中，将光线向下反射。

youdao

White is another roof colour used to fight both the urban heat island effect and global warming in general, by simply reflecting light back into space.

白色可以直接把光反射到空中，也通常是一种被用来对付城市热岛效应和全球变暖的屋顶颜色。

youdao

This gives them their color. However,when light travels from air to snow, some light is sent back,or reflected.

VOA: special.2010.01.05

and of course we've already been gazing at that light back there, and it's not a good example.

如果我们看着那里的灯，虽然这个例子有些瑕疵。

耶鲁公开课 - 文学理论导论课程节选

It's a dream of changing the tradition, of having that individual voice added to the tradition, to have it become part of the official heritage and yet at odds with it, casting a different light back.

这是试图改变传统的梦想，试图在传统中,加入自己的声音，让其成为官方遗产的一部分,尽管格格不入，在后面投入一片不一样的光亮。

耶鲁公开课 - 1945年后的美国小说课程节选

Jorno, a promising folding Bluetooth keyboard, first saw public light back at the Consumer Electronics Show in 2011.

ENGADGET: Switched On: Higher stakes, higher ground for crowdfunding, part 1

So it's not the journey that's slowing things down, it's the conversion from electronic signal to light and light back to electronic signal.

CNN: Surfing at the speed of light

Tomson says the child has brought light back into his life.

CNN: Surfing legend shares lessons in life