載入中... 相關課程 Back L6 發音(o u) 相關課程 0 / 750 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. L6 發音(o u) 上傳學習單 下載學習單