区别就是两者意思是不一样，具体的不同如下
parker中文意思是n. 停放车辆的人
n. (Parker)人名(英、俄、西、瑞典、德、捷)帕克
The next day there was still no ship in sight， so Dudley told Brooks to avert his gaze and he motioned to Stevens that the boy， Parker， had better be killed.
madison中文意思是n. 麦迪逊（姓氏）麦迪逊（美国城市）
