where引导的是定语从句，修饰名词 point。

where引导的是定语从句，修饰名词 point。下面再补充几例：

I’ve reached the point where I’m about ready to retire. 我已到了准备退休的年龄。

This is the point where total cost equals total revenue. 这就是总花费等于总收入的那一点。

Things are getting to the point where we can’t stand to be in the same room. 事情糟到了我们不能共处一室的程度。

The discussion picked up this morning at the point where we had stopped yesterday. 今天上午，我们接着昨天的内容开始了讨论。