載入中... 相關課程 Back firm: firm, 公司;商行, 結實的;穩定的;堅決的, firmly, 堅固地;堅定地 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. firm: firm, 公司;商行, 結實的;穩定的;堅決的, firmly, 堅固地;堅定地 上傳學習單 下載學習單