Eugie 以一种俏皮、嘲弄但不失亲密的方法来审视他,这种方法概括了他们彼此之间作为兄弟的感受.
slyly and mockingly and yet confidentially 插入成分,作状语,修饰 looking at
that had summed up how they both felt about being brothers 定语从句,先行词为 a way