Definition
To have experienced the most enjoyable or advantageous part of something, with the implication that what remains is less desirable.
已經享受過最美好的部分，之後的都變差了
We've had the best of the trip already; the rest of the itinerary might not be as exciting.
我們已經享受過這趟旅程最精彩的部分了，接下來的行程可能沒那麼令人興奮。
It seems this team has had the best of their time; their peak performance is behind them.
看來這支隊伍已經過了他們的巔峰時期，最佳表現已經成為過去。
The service at the restaurant was the best when we first arrived; it's been going downhill since then.
我們剛到餐廳時服務是最好的，之後就一直在走下坡路。