Well, hard cases there.

这是个难题
So similarly,

那么同理
there's going to be hard cases about the very, very early stages.

在最初阶段我们也不好下结论
And although they're great questions

当然这些都是好问题
and I'm happy to discuss them with you further,

我也愿意在课后和你们继续探讨
I don't want to pursue them here and now.

但是现在我不想说太多
I want to point to a different question that--

我想提出另一个不同的问题
I think it's a crucially important question.

我认为它是一个非常重要的问题
My unwillingness to discuss them

我不愿意继续讨论刚才那些问题
isn't a matter of my judgment that they're unimportant,

并不是因为我觉得它们不重要
just trying to keep at least roughly on track.

我只是希望能够大致保持进度
Come back to the end of life.

让我们回到生命结束的时候