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.
国内成品油价格调整在即，市场预期本轮价格上调
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因此当匈牙利总理欧尔·维克托上月受邀在《星期日世界报》发表重磅评论文章时——距离这位右翼民粹主义者职业生涯中最危险的选举不足四周——此事引发了巨大震动。斯普林格旗下这家大报的前任编辑坦言：“这引发了强烈的愤慨。”
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