趣味物理。
💭 https://t.co/dBWpRCedbt https://video.twimg.com/ext_tw_video/1830744253657460736/pu/vid/avc1/720x1280/6IsahjCiicMh8GLa.mp4?tag=12
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第二个速度不够快，够快不用报纸盖
