光电升降机内的电气连接涉及到电子学。
The electrical connection in the photoelectric elevator involves electronics.
当HTP接触到火箭发动机内的催化剂时，就转变成气体和氧气。
When the HTP comes into contact with a catalyst contained within the rocket, it turns into steam and oxygen.
最后，一体机内的所有组件都是制造商统一控制的，可以一直工作。
Finally, because the manufacturer has control over every component going into their PCs, well, "they just work."
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