White paper is white because it reflects all colors of light .

白纸之所以是白色的因为他反射所有的光线。

Everything you see reflects light and casts some sort of shadow .

你看到的每样东西都是通过光影反射形成它的形象。

Usually of course we can only see the moon because it reflects sunlight .

通常我们只能看到月球是因为月球反射太阳光。

The actual detection is done by infra-red light , which reflects off the user 's skin and clothes .

实际上，手势的探测是由红外线光反射用户的皮肤和衣服来完成的。

Color is the most expressive element of art and is seen by the way light reflects off a surface .

颜色是美术中最具表现力的要素，同时它也是光在物体表面的反射。