Just point at the start of this list, and this one so which number comes first?

指向列表的开始处，对于它来说,哪个数字在前面？

哈佛公开课 - 计算机科学课程节选

First of all, situation number one, well, you know how to do that.

首先，情形一，你们知道如何做。

麻省理工公开课 - 固态化学导论课程节选

First of all, as I just noted, the argument needs premise number one.

首先,像我刚才提到的,这个论证的成立需要前提一

耶鲁公开课 - 死亡课程节选

The first one is the number of neurons firing.

第一个是产生神经冲动的神经元数量

耶鲁公开课 - 心理学导论课程节选