It's the most important step in the human story.

这是人类历史中最重要的一步。

His task is to convey the human story: the scientific basis for the possible future of his story is merely the background.

他的任务是要讲述与人有关的故事：充当他故事中可能出现的那个未来的科学依据，仅仅是个背景资料。

But the heated language on both sides tended to overshadow the human story at the center of the case.

然而，正反两方的激辩却有可能掩盖处于事件中心的个人故事。