a woman from London who has the right to dress in special black clothes covered with pearl buttons,

中文解释

珠母纽后（伦敦的一项传统，获授权身穿缀满珠母纽扣服装，为慈善机构收集捐款的女子） They went to the fancy dress party dressed as a pearly king and queen. 他们扮成珠母纽王和珠母纽后去参加化妆晚会。