在空气动力学上，升力是重量，推力和阻力(空气阻力)的相关的函数。
In aerodynamic terms, lift is a function of weight, thrust and drag (air resistance).
一个最早的软件物理引擎是ENIAC计算机，用来仿真给定了重量、角度、推力和风速变量的炮弹。
One of the earliest software physics engines was the ENIAC computer, which was used to simulate artillery shells given variables of mass, Angle, propulsion, and wind.
利用光束作为外部能量源可以减轻火箭自身携带的系统重量和质量，为科学研究扩大有效载荷空间，并提供更大的推力。
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 propulsive power.
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