1. add subtitle
2. The first obstacles---delete the s
3. we may still not BE familiar with the Chinese dictionary
4. There is an app that is fast and convenient in learning Chinese. This app is called Pleco.-combine
5. "The next obstacle is ABOUT the same words but have definitely different meaning."
6. Conclusion needed to be modified
7. Add some about Chinese dictionary information(how difficult it is for people to use…)