I saw many animals that I have seen before.

我看到了许多我从没看过的动物。

youdao

It is the best film that I have seen before.

这是我以前所看过的最好的电影。

youdao

And although I cannot trace any special forms, there is a hint of fullness and of richness which makes me think: this I have seen before.

尽管我不能找出任何特别的形式，但仍有种对完整和丰富的暗示，让我觉得：这个我曾经见过。

youdao

"There was an extraordinary embrace of the entire city of the Olympic Games, something I have never seen on this scale before.".

VOA: standard.2010.03.01

And these shapes of p orbitals probably do look familiar to you, most of you, I'm sure, have seen some sort of picture of p orbitals before.

这些ｐ轨道的形状你们可以能已经很熟悉了，我相信大部分人，都看过ｐ轨道的图片。

麻省理工公开课 - 化学原理课程节选

I mean, you may not understand it with algebra before but some of these sorts of pictures have you seen before?

我是说可能代数部分你没看懂,但你们以前见过类似的图像吧

耶鲁公开课 - 博弈论课程节选

The build up to this Champions League final is like none I have seen before.

BBC: Fans are singing together in Rome

It is just an observation that I have been making for the last couple of years that I have never seen before.

FORBES: The Republican Whiplash Effect- Do They Ever Just Tell The Truth?

The news the USPS will stop delivering mail on saturdays has prompted some post office navel gazing, and with it has come a claim I have seen made before: that the U.S. Postal Service is the most efficient in the world.

FORBES: Is The U.S. Postal Service The World's Most Efficient?