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.
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。
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Which indicates, naturally enough, that the computer should add the values stored in the variables n1 and n2.
这指出了，自然而然地，计算机需要将存储在变量n1和n2中的值相加。
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Bayesian networks are today's standard method for handling uncertainty in computer systems, processing thousands of variables and millions of observations.