it would be possible to inject ideas into the modern world that would utterly destroy us. 这个句子看起来还是比较简单的。“that would utterly destroy us”在句中做定语从句修饰“ideas”！总体来看是主+系+表结构的！“it”作形式主语，后面“to inject ideas into the modern world that would utterly destroy us”才是句子真正的主语，其中。“that would utterly destroy us”作为定语从句修饰“ideas”！...
