To get the highest possible score, you do need a wide range of vocabulary.

要想得到最高的分数，你需要广泛的词汇量。

I'm at 99 out of 100, which is the highest possible score for speaking rate.

我的分数是 99 分（满分 100 分），这可能是语速部分的最高分。

So here's one that I wrote and I uploaded this to the e-rater, and it got a score of five, which is the highest possible score.

这是我写的一篇文章，我把它上传到了电子评分系统，它得到了 5 分，这是可能的最高分。

AP exams are graded on a numerical scale – a system of numbers – from one to five, with five being the highest possible score.

AP 考试按照数字等级（一种数字系统）从 1 到 5 进行评分，其中 5 是最高分。