《未来来客：穿越时空的启示与挑战》图纸上的标高怎么看

　　The android Kent is programmed to travel back in time and save humanity from its future. His way leads to earth, which is going to be destroyed by a great rocket-disaster. As he wants to prohibit this, a mad scientist is in his way. But there are more problems: He has to act as a human. Computer-expert Jonathan Driscoll becomes his mentor and tries to help and repair him.