As a result, he offered an unheard-of guarantee.

于是，他提供了一所未的担保。

" We have not heard about such numbers before" he said.

他说，" 这样庞大的数字，以前所未" 。

Polo told of many amazing things that were unknown to Europe, such as paper money.

马可·波罗讲到的许多神奇的东西在欧洲是所未的，如：纸币。

Do not imagine that it was a very unheard-of idea.

你不要以为这是所未的妙论。

Mr Abe's death has deeply shocked Japan, where gun violence is almost unheard of.

在枪支暴力几乎所未的日本，安倍之死令人感震惊。

The discovery of fossilized skin is not unheard of, but it is remarkably rare.

化石皮肤的发现并非所未，不过也是相当少见。

Mass shootings are rare but not unheard of in Thailand.

大规模枪击事件在泰国很少见，但也并非所未。

It is a trait that is not known to the higher animals.

这是一种高级动物所未的特点。

So, a cousin we didn't know existed framed us?

我们被一所未的表兄弟陷害了吗？

A young white man stopped to help her, generally unheard of in those conflict-filled 1960s.

一位年青的白人男子停下车来帮她，这在充满种族冲突的20世纪60年代简直是所未。

It's unheard of. - Yeah! Unheard of.

从没听说过 - 是啊 所未。

Swarms like this aren't totally unheard of.

这样的虫群并不完全是所未的。

And you did a lot of episodes of. - 22. - Which is really unheard of.

你拍了很多集。- 22 集。- 这真是所未。

This is the climate crisis you haven't heard of, said Philippus Wester, who led the report.

这是所未的气候危机，该报告的牵头人菲利普斯·韦斯特如是说道。

One of these desert residents is a small one that you may have never heard of.

其中一位沙漠居民可能是你所未的小家伙。

" And sharing data before you publish your paper was almost unheard of. That's completely changed."

在发表论文前分享数据几乎是所未的情况。这已经完全改变了。”

And unfortunately because of the reporting on war that fact about Afghanistan has completely remained unheard of.

不幸的是，由于有关战争的报道，这些有关阿富汗的事实完全所未。

T-Rex is a pretty rare dinosaur, but juveniles are almost unheard of. So its discovery was pretty significant.

霸王龙是一种较少见的恐龙，幼年的更是几乎所未。所以这次发现很有意义。

They could lease out space - block Saudi shipments of oil, which once would have been unheard of.

他们可能会出租空间，阻止沙特油轮，这曾经是所未的。

His death profoundly shocked the country where handguns are banned and incidents of political violence are almost unheard of.

他的死地震惊了这国家，在日本是禁枪的，政治暴力事件几乎所未。