I wanted to eat in the dining car because I had read all about them（并列句分句1;主从复合句，从句为because 引导原因状从）, but my mother reminded me for the umpteenth time that dining car food always cost too much money and besides, you never could tell whose hands had been playing all over that food, nor where those same hands had been just before (but引导的并列句分句2，主谓双宾结构, 其中reminded 后面又有两个宾语从句，that 引导的； you never could tell 引导的......).
I learned later that Phyllis's high school senior class trip had been to Washington（并列句分句1; 主从复合句，从句为that 引导的宾语从句）, but the nuns had given her back her deposit in private, explaining to her that the class, all of whom were white, except Phyllis, would be staying in a hotel where Phyllis "would not be happy," meaning, Daddy explained to her, also in private, that they did not rent rooms to Negroes（but引导的并列句分句2，主谓宾结构, 其中explaining to her ... 部分做方式状语，其后的that 引导宾语从句，宾从中的where 引导定语从句，meaning 后面部分....做原因状语）.