that 在这里不是引导从句,而是“那个”的意思。如果你把that替换成a,就很容易理解了。A movie of me leaving a foxhole would look like a shell leaving a rifle.句子结构是:A(A movie of me leaving a foxhole)would look like B (a shell leaving a rifle). 这个句子结构中的B是一个省略结构,省略了a movie of,完整的B结构是:a movie of a shell leaving a rifle。整个句子的意思就是:A看起来像B(这是一个类比结构)。