空前绝后kōng qián jué hòu

HSK Level 6

unsurpassed; never known before and never to occur again

This toy is unprecedented and unparalleled, I like it so much.

The scale of this global cooperation is so large that it can be described as unprecedented and never to be repeated.

Do you really think this kind of opportunity is unique and will never come again?

His achievements are unprecedented and unparalleled in history, no one can match them.

The stage effects of that concert were not unparalleled, but the atmosphere was indeed fantastic.

The promotional discount this time is unprecedented; we need to hurry and go shopping.

The quality of the artworks in this exhibition is so high that it can be called unprecedented and unparalleled, attracting countless visitors.