The day was split up into 6 one-hour sessions.

一天的活动分作6个时段，每个时段一小时。

We were split up into groups to discuss the question.

我们分组讨论了那个问题。

We split up into groups of five.

我们分成五组。

The party split up into two groups.

这个党分成了两派。

Hold on. Lets split up into groups.

等等，让我们先分组。