他比自己以前的最好成绩快了一秒多。

He was over a second faster than his previous best time.

《柯林斯英汉双解大词典》

库根跑出了刚好低于四分钟的个人最好成绩。

Coogan has run a personal best of just under four minutes.

《牛津词典》

她以2分22秒的个人最好成绩赢得了这项比赛。

She won the race with a personal best of 2 minutes 22.

《牛津词典》

And you know, my concern is getting the best mark, the best grade for myself,

你知道，我关心的是怎样拿到最好的分数，最好的成绩给我自己，

怎么协调意见冲突 - SpeakingMax英语口语达人