The airplane, the automobile, and even the rocket are based on this basic idea of deriving huge amounts of propulsivepower by burning fuel.
飞机，汽车，甚至火箭的动力都是燃料燃烧产生的巨大推进力。
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Using light as an external power source can alleviate the weight and mass of having an onboard system, leaving room for scientific payloads, for example, and it provides more propulsivepower.
The theoretical research on the principle and method of controlling azimuthing propulsive system of ships are carried out in the paper and achieved in the application for high power tugs.