1. This painting is considered the ne plus ultra of Renaissance art.
这幅画被认为是文艺复兴艺术的巅峰之作。
2. Her performance was the ne plus ultra of grace and poise.
她的表演是优雅与沉着的极致体现。
3. For many collectors, this rare book is the ne plus ultra of their library.
对于许多收藏家来说，这本罕见的书籍是他们图书馆中的至宝。

A: Do you think this restaurant is the best in town?
A：你认为这家餐厅是镇上最好的吗。

B: It is certainly the ne plus ultra of fine dining in this city.
B：它绝对是这座城市高级餐饮的巅峰。

1) 巅峰，最高点

2) 极致，完美境界

3) 无可比拟的事物

1. 巅峰；极点；最高境界

e.g.
This collection is the ne plus ultra of rare coins.
这套收藏品是稀有硬币收藏的巅峰。

noun

1. The highest or best point of something; the ultimate perfection.

Synonym: pinnacle, zenith, apex