Athlete must fill in their Personal Best(P.B.) of 2007-2008 for each participating event. The Heat and Lane assignment will be processed according to their P.B.是什么意思_Athlete must fill in their Personal Best(P.B.) of 2007-2008 for each participating event. The Heat and Lane assignment will be processed according to their P.B.在线翻译_英语_读音_用法_例句