one-off

adj

Occurring once, independent of any pattern; one-time. / Singular; unique; special; remarkable.

This is a one-off opportunity that you don't want to miss.

意味（1）

Occurring once, independent of any pattern; one-time.

The government insisted that the embarrassing loss of the tax records was a one-off event.

意味（2）

Singular; unique; special; remarkable.

BMW is to create a one-off tribute to the iconic 3.0 CSL.