Like never before and never again.

从没有过，也不会再现的爱。

youdao

What happened in Istanbul was a unique event, it never happened before and never will again.

伊斯坦布尔发生的事是个特例，这种事以前没出现过，今后不会再发生了。

youdao

Many of the sequences have never been filmed before. Some may never be filmed again. Corals have survived 5 mass extinctions. But can they survive us?

许多序列前从未拍过。有些人可能永远不会被再次拍摄。珊瑚生存的5大灭绝。但他们能否生存呢？

youdao

Alexander,who had never baked before, says he knew the only way to have this kind of bread again was to learn how to make it himself.

VOA: standard.2010.07.16

As we walk towards our camera position in the Market Place, just minutes after arriving in a town I have never visited before and will probably never visit again, with Jennie Bond leading the way down a street already lined with crowds clutching flowers and Union Jacks, I have an epiphany.

BBC: Jubilee tour diary: Western Isles

"I was thinking, 'This has never happened before in poetry, and I'm sure it will never happen again, '" says John Barr, president of the Poetry Foundation, the author of six volumes of poetry and a former investment banker.

FORBES: Magazine Article

Big data can be a huge asset with identifying a lot of areas that were never seen before too, but again the balance as we still rely on people such as doctors to make decisions and deliver care.

FORBES: Using Big Data to Help A Hospital Meet The Financial Future