You've got a plane that's thousands of feet up in the air, going at hundreds of miles an hour, and you're trying to drop an object, a bomb, towards some stationary target in the face of all kinds of winds and cloud cover and all kinds of other impediments.
飞机在几千英尺的高空 以每小时几百英里的速度飞行 然后要投下一个炸弹 命中一个静止物体 还得考虑风和云层 及其他各种参数