載入中... 相關課程 Back observe: 觀察的 , observation, 觀察, serve, reserve, conserve, preserve 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. observe: 觀察的 , observation, 觀察, serve, reserve, conserve, preserve 上傳學習單 下載學習單