I don't really feel at my best today.

我今天不太舒服。

《牛津词典》

I practised singing in the bedroom every day to remain at my best and be competitive for roles.

我每天都在卧室里练习唱歌，以保持最佳状态，竞争角色。

youdao

I wasn't at my best.

我还没有在最好的状态。

youdao

And even at its best the benefit would be, in my judgment, outweighed by the probable costs of the counter-insurgency,".

VOA: standard.2009.10.15

I have to say that Shelly Kagan is probably the best lecturer I had in my four years at Yale."

我不得不说薛立·卡刚很可能是,我在耶鲁四年所遇到的最好的演讲者“

耶鲁公开课 - 死亡课程节选

This was my best attempt at hitting zero and not having the graph go down there.

这是我最好的尝试,使它接近零但又不掉下去。

麻省理工公开课 - 化学原理课程节选

I'm going to have to be at my best against her.

NPR: Djokovic, Sharapova Cruise At Aussie Open

Instead, it was a classic case of burnout: multiple, chronic stressors over an extended period of time left me totally drained and no longer performing at my best.

FORBES: 10 Signs You're Burning Out -- And What To Do About It

"I'm still not back at my very best but I'm getting there, " she said.

BBC: Britain's Mara Yamauchi wins New York Half Marathon