A split second later, Harry knew why.

哈利马上就知道为什么了。

And I had a split second to decide.

我不免有一秒的出神在纠结这个问题。

When I woke up this morning, I forgot for a split second.

我今早醒来时，有那么一瞬间我忘了。

But everything changed in a split second.

但一切都在一瞬间改变了。

It's so funny, for a split second.

有那么一瞬间，它是如此有趣。

For a split second, Harry thought it was another leprechaun formation.

哈利一开始以为又是小矮妖组成的图形。

But it was with you for a split second.

但的确和你并排了很短的时间。

That split second of a distraction might cause a life.

一刹那的分心可能会造成生命危险。

A split second later, the ventricle enters its refractory period.

一瞬间以后，心室进入了不应期。

" It seemed normal in the split second before I realized, Wait, what's happening? "

“那一瞬间我并没有觉得有何不妥，下一刻我才回过神来，等一下，刚刚什么情况？