孩子们上午上四节课，下午上两节课。

The children have four classes in the morning and two in the afternoon.

youdao

我们通常上午上四节课，下午上两节课。

We usually have four classes in the morning and two classes in the afternoon.

youdao

通常我们下午上两节课。

We usually have two classes in the afternoon.

youdao

I thought I would just remember a couple of highlights from the first two lectures to consolidate what we said then.

我想再重申一下,上两节课的几个重点,以便巩固我们讲过的内容。

耶鲁公开课 - 金融市场课程节选