懂物理的驴子都知道，爬陡阶梯最省力的方法就是横向攀爬。 https://t.co/4fSV8DqDdM https://video.twimg.com/ext_tw_video/1847977445976076288/pu/vid/avc1/720x1080/5nTrnJwbvTyknavm.mp4?tag=12
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