I was thinking that I've really never seen it before.

我在想，我以前从来没有见过它的样子。

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I had never seen the sky white with smog before, and my chest hurt from the pollution, making it difficult to breathe.

我从来没有见到过被烟雾笼罩的白色天空，我的胸口因污染的空气而感觉疼痛，我感到呼吸困难。

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In fact, just when I think I have "seen it all," I am presented with a new challenge never before encountered.

事实上，当我认为已经“完全了解”的时候，我遇到了之前从来没有遇到过的新挑战。

youdao

Here is a reading of his description of his first sight of the bats and the big cave: "I thought it was a volcano, but then,I'd never seen a volcano nor never before had I seen bats swarm, for that matter.

VOA: special.2009.12.07

I've read through the same thing twenty times and I've missed something obvious. Someone who's never seen it before looks at and says, did you really mean to do this?

但是它们有一双旁观者之眼,我把同一段代码读上20遍,都会漏掉一些很明显的错误，从没看过这段代码的人会告诉我？

麻省理工公开课 - 计算机科学及编程导论课程节选

"I've never seen it in writing before, " Neal said.

CNN: Acura apologizes for seeking 'not too dark' actor

"I'd never seen Millie ill before and it broke my heart for her to look like that, " she said.

BBC: Millie Martin murder: Mother gives evidence

"I have never seen it get this high in this area before, " said Bonifay.

CNN: STORY HIGHLIGHTS