When I read the research of professors, I was very happy but after talking directly with the professor I am very depressed, I feel bad for not speaking English well. Since I quit studying English since 2002 so when communicating with professors are very limited. Everyday, I berate myself for the limited knowledge. I'm sorry to bother you Pham Thanh Nam when he introduced me to a professor but I would do no good.
đang được dịch, vui lòng đợi..
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