轨道标准包括针对6型（110英里/时，约合177千米/时）及以上类型轨道在车体加速和蛇形摆动的远距离遥控方面的要求，以及实际路线的设备质检要求。
The track standards include requirements for Class 6 track (110 mph) and above for remote monitoring of carbody acceleration and truck hunting, and equipment qualification on actual routes.
接近简单的史瓦西类型(非旋转)黑洞中心的物体将会对远距离的观察者当物体接近活动视界时候存在日益增加的慢降落。
An object approaching simple Schwarzschild-type (non-rotating) black hole's center will appear to distant observers as having an increasingly slow descent as the object approaches the event horizon.
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