translation.en: I like to imagine Schwarzschild in the war in the trenches calculating ballistic trajectories for cannon fire, and then, in between, calculating Einstein's equations -- as you do in the trenches.
translation.zh: 我乐于想象史瓦西躺在战壕里 计算着加农炮的弹道轨迹， 然后再时不时地， 算算爱因斯坦方程– 试想一下那是什么样的一个情景。