載入中... 相關課程 Back proper: correct, right, appropriate, 適當的, 正確的 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. proper: correct, right, appropriate, 適當的, 正確的 上傳學習單 下載學習單