26.89 seconds for the 50m Freestyle (LCM) is indeed a USA Swimming AAAA standard for female swimmers in the 17-18 age group, and it is a much faster time than the range I initially provided. 它原来提供的范围是20.0 - 23.5秒的样子。我说你这个不对头啊。人家那高中年纪26.89就AAAA。20秒不可能吧。