載入中... 相關課程 Back circle: 環行, 繞圈, circulate, 循環, 流通, 發行, circular, 圓的, cycle, 週期, 循環, recycle, 回收, 再利用 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. circle: 環行, 繞圈, circulate, 循環, 流通, 發行, circular, 圓的, cycle, 週期, 循環, recycle, 回收, 再利用 上傳學習單 下載學習單