載入中... 相關課程 Back concern: 關心, 擔心, concerned, 擔心的, 煩惱的, concerning, 關於 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. concern: 關心, 擔心, concerned, 擔心的, 煩惱的, concerning, 關於 上傳學習單 下載學習單