""" We need to translate the HTML content from English to Simplified Chinese, preserving tags. Provide only the translated HTML. We need to translate all visible text, not URLs. Keep tags unchanged. Let's translate each piece:

The fastest object ever launched was a manhole cover — here’s the story from the guy who shot it into space

Translate: "有史以来发射最快的物体是一块井盖——以下是把它射入太空的那个人的故事" But we need to keep punctuation maybe Chinese punctuation. Use Chinese characters.

有史以来发射最快的物体是一块井盖——以下是把它射入太空的那个人的故事

Next paragraph:

Two angles facing left, which often indicate, “return to the beginning.” Two angles facing right, which often indicate, “advance to the end.”

Translate: "两个向左的角度，通常表示“返回起点”。两个向右的角度，通常表示“前进到终点”。" Need to preserve HTML entities for quotes? The original uses “ and ” for left and right double quotes. We can keep them or replace with Chinese quotes? Probably keep them as they are but translate the text inside. Original: Two angles facing left, which often indicate, “return to the beginning.” Two angles facing right, which often indicate, “advance to the end.” We can translate to Chinese and keep the HTML entities for quotes. So: "两个向左的角度，通常表示，“返回起点。” 两个向右的角度，通常表示，“前进到终点。”" Make sure spaces. Next paragraph:

When I first heard this story, I didn’t believe it.

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Translate: "当我第一次听到这个故事时，我不敢相信。" But note the apostrophe entity ’ is ’. So we can keep as Chinese punctuation. So: "当我第一次听到这个故事时，我不敢相信它。" But original "I didn't believe it." We'll translate "我不相信它". Use "我不敢相信它". Keep. Next:

How could an iron manhole cover be the fastest human-made object ever launched?

Translate: "铁制井盖怎么可能成为有史以来发射最快的人造物体？" Next:

I honestly pictured something akin to the exploding manhole covers that terrify NYC residents:

Translate: "我真的想象到的画面是类似于那些让纽约市居民惊恐的爆炸井盖：" Next:

It wasn’t like that. This manhole cover was shot into space with a nuclear bomb.

Translate: "事实并非如此。这块井盖是用核弹射入太空的。" Next:

Robert Brownlee, an astrophysicist who designed the nuclear test in question, told Tech Insider the unbelievable story.

Translate: "罗伯特·布朗利（Robert Brownlee），一位设计了相关核试验的天体物理学家，向《Tech Insider》讲述了这个令人难以置信的故事。" Next:

He refutes his critics and asserts that yes, it likely was the fast… Continue Reading

Translate: "他驳斥了批评者，并断言是的，它很可能是最快的…… 继续阅读" Need to keep the link unchanged. So: "他驳斥了批评者，并断言是的，它很可能是最快的… 继续阅读" Note the ellipsis entity … is … . Keep. Next:
No translation needed. Next:

Source: https://www.businessinsider.com/fastest-object-robert-brownlee-2016-2

Translate "Source:" to "来源：" maybe. So:

来源: https://www.businessinsider.com/fastest-object-robert-brownlee-2016-2

Now ensure all tags remain. Let's produce final HTML. Check for any missing spaces. Full HTML:

有史以来发射最快的物体是一块井盖——以下是把它射入太空的那个人的故事

两个向左的角度，通常表示，“返回起点。” 两个向右的角度，通常表示，“前进到终点。”

当我第一次听到这个故事时，我不敢相信它。

铁制井盖怎么可能成为有史以来发射最快的人造物体？

我真的想象到的画面是类似于那些让纽约市居民惊恐的爆炸井盖：

事实并非如此。这块井盖是用核弹射入太空的。

罗伯特·布朗利（Robert Brownlee），一位设计了相关核试验的天体物理学家，向《Tech Insider》讲述了这个令人难以置信的故事。

他驳斥了批评者，并断言是的，它很可能是最快的… 继续阅读

来源: https://www.businessinsider.com/fastest-object-robert-brownlee-2016-2

Make sure we keep the original line breaks? Not needed but fine. Return only the HTML.assistantfinal

有史以来发射最快的物体是一块井盖——以下是把它射入太空的那个人的故事

两个向左的角度，通常表示，“返回起点。” 两个向右的角度，通常表示，“前进到终点。”

当我第一次听到这个故事时，我不敢相信它。

铁制井盖怎么可能成为有史以来发射最快的人造物体？

我真的想象到的画面是类似于那些让纽约市居民惊恐的爆炸井盖：

事实并非如此。这块井盖是用核弹射入太空的。

罗伯特·布朗利（Robert Brownlee），一位设计了相关核试验的天体物理学家，向《Tech Insider》讲述了这个令人难以置信的故事。

他驳斥了批评者，并断言是的，它很可能是最快的… 继续阅读

来源: https://www.businessinsider.com/fastest-object-robert-brownlee-2016-2