載入中... 相關課程 Back 【例題】兩物重疊不相對滑動:施力於下方物體 登入觀看 ⇐ Use this menu to view and help create subtitles for this video in many different languages. You'll probably want to hide YouTube's captions if using these subtitles. 【例題】兩物重疊不相對滑動:施力於下方物體 上傳學習單 下載學習單