Point the camera at a white background, and observe this phenomenon with a magnifying glass.
将相机对准白色背景，然后用放大镜观察这种现象。
That historian might also observe that the curiosity was only a temporary phenomenon and mankind reverted back to the traditional state of affairs-arbitrary control and abuse.
历史学家也许还会观察到这出奇仅是一个短暂的现象，人类很快又返回到传统的恣意控制与滥用状态。
This phenomenon is most readily understood from the point of view of the stationary observe a.
从静止的观察者a的角度看，这个现象是最容易理解的。
应用推荐