Back 【解題】從左開始數,數到第 15 個,共有 15 人 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. 【解題】從左開始數,數到第 15 個,共有 15 人 上傳學習單 下載學習單