Do not forget that snow is a reflective surface, it will bouncelight off pretty much everywhere.
别忘了雪是一个反射性的表面，它将反弹非常多的光线。
2
Most lasers use silicon mirrors to bouncelight wavelengths back and forth, but silicon can't reflect powerful X-rays.
目前大多数激光器是用硅来做反射镜，来来回回地反射激光X射线，但硅反射镜不能反射功率大的X射线。
3
They are even collaborating with a group in China that will launch a satellite in 2016 which should be able to bouncelight waves from a sender on one part of the Earth to distant receiver elsewhere.