Now that our relationship to the earth has changed so utterly, we have to see that change and understand its implications.
句意：既然人类与地球之间的关系发生了这样根本性的变化，我们就有必要考查分析这一变化并认 清其实质意义。implications含义；言外之意。significance重要性。consequence结果；成果。implied meaning寓意；隐含意义。sequence顺序；序列。C选项与划线处意义最为接近，故选C。