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我的论坛主要是围绕产品开发以及其商品化两方面进行讨论的，欢迎大家畅所欲言，发表自己的观点！
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About Me
- Ritsing Yang
- Hi! i'm ritsing. I'm interested in English. But I can understand English little. I want to learn English,to communicate with foreign people and to understand English more.
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