英语翻译What causes this generation to be poles apart from its p

What causes this generation to be poles apart from its predecessors is not just its demographic force but that it is the first to mature surrounded by digital media.
造成这一代人与先祖们截然相反的原因不仅仅是因为人口（众多）的力量,而更因为这是最先成功围绕在数字媒体周围的一代人.
结构拆分：
可以简化为 What .is not .but .
主语：What causes this generation to be poles apart from its predecessors
谓语 is
宾语：not .but...是2个并列的原因.
not just its demographic force but that it is the first to mature surrounded by digital media
But 后面以从句成分存在的原因.