Firefox extension that helps you learn English better and easier.
- Translate the selected word/phrase/sentence from English to Chinese.
- Collect/Favorite new word.
- Recite the collected word.
- See the real-time bilingual live subtitles while watching Youtube videos.
-  Save The Guardianarticle automatically for later test.
For more features, you could have a look at the official website.
- All collected words will be hightlighted on the webpage.
 
- You can search unknown words by selecting text.
 
- Realtime translation panel
 
You can see the real-time bilingual live subtitles while watching TED videos.

You can save the YouTube video to your account and see the real-time bilingual live subtitles later.