... theo nhip dieu ddu nhanh, ddu chdm, ddu manh. ddu nhe, deu cao, ddu thap Neu khdng biet cdch van dung cac yeu td ngu dieu, ngudi dgc dd red vao ttang thdi dgc ddu ddu, thieu bieu cdm. ... Hi Anh Tuih. Trong khi dd, vdi Idi ndi trong phuang thdc ndi thi dudng net bidu thj nhjp dieu bien ddng hen tue: luc ddu la tdng gigng tbd'p, sau cao dan, tdc do ldc ddu la chdm, sau ... giup khcd day cac chidu canh cam xdc phong phu d ngudi nghe. Mudn dat dugc didu dd, ngudi dgc phdi cd dugc cam gidc hda nhdp vdi cdu chu, rang ddng thyc sy vdi nhung didu dang dgc. Mdt thyc...