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Ha! Then here’s a paradox: The force that enables you to move—let’s say to walk—is static friction, not kinetic friction. When you push off the ground with your back foot, static friction keeps your foot from sliding out from under you. (For laughs, see my recent article about trying to climb out of an ice bowl.) The same is true for the locomotive: It uses static friction to drive itself forward.。吃瓜网对此有专业解读
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Алиса Дмитриева (Редактор отдела «Из жизни»)
except (ValueError, OverflowError):,推荐阅读移动版官网获取更多信息