to be not at one’s best 不在狀態
英文釋義
To be lacking one's full abilities, good health, or emotional composure (usually temporarily).
例句
I am not at my best when I'm tired, and I avoid making important decisions or meeting clients until I have rested.
我一累就不在狀態,不經過休息,我就不會做重要決定或會見客戶。