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Kinh nghi?m ch?i activity: Các bài vi?t chia s? kinh nghi?m ch?i recreation, cách qu?n lý v?n, chi?n l??c ch?i,… giúp ng??i ch?i nâng cao k? n?ng ch?i. A correctly recognized model must supply ample overall flexibility for the method designers to translate the method product right into a control recipe in a well-known environment without