颗粒会反射闪射的激光，这样高速的摄像机就可以跟踪拍摄。
The particles reflect light from flashing lasers, so they can be tracked using high-speed cameras.
天体的拍摄可以分作两类：一个是静止摄像，一个是跟踪拍摄。
Shooting of the celestial bodies may be divided into two types: shooting with the static camera and shooting with follow.
美国国家宇航局希望在大约一年之后看到它跟踪拍摄火星的情况。
About one year from now, NASA expects to see it making tracks on Mars.
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