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1·It is almost unheard-of for a new band to be offered such a deal.

一支新乐队得到这样的待遇，几乎是空前的。《牛津词典》

2·He'd dyed his hair, which was almost unheard-of in the 1960s.

他染了头发，这在20世纪60年代是罕见的事。《牛津词典》

3·Being relatively small, the screen had a resolution of a then-unheard-of 200 pixels per inch (ppi).

一款相对较小的显示器，它拥有一个前所未闻的每英寸200像素的显示屏。

4·He sometimes fires people for simply not doing a good job, “unheard-of in government service,” he wryly notes.

有时候，盖茨会因为部下干得不够好就打发他走人，并在辞退备注里面讽刺地写上“没听说过有这个人”。

5·Riots are almost unheard of in Japan.

暴乱在日本几乎是闻所未闻的。《柯林斯英汉双解大词典》

6·Pay cuts, unheard of during times of growth, may even be imposed.

在经济增长时期闻所未闻的减薪，甚至都可能被强制执行。

7·It's almost unheard of for a child to show up hungry to school.

孩子饿着肚子上学几乎是闻所未闻的。

8·Practically unheard of a generation ago, the discounts have become a routine part of many businesses—as common as color televisions in motel rooms and free coffee on airliners.

上一代人几乎闻所未闻的打折已经成为许多企业的惯用手段——就像汽车旅馆房间里的彩电和航班上的免费咖啡一样普遍。

9·After all, true vitamin deficiencies are practically unheard of in industrialized countries.

毕竟，真正的维生素缺乏在工业化国家几乎闻所未闻。

10·It is not unheard of for buildings to be razed after 10 or 15 years.

建筑物在10年到15年之后再夷为平地，这并不是前所未闻的事。

空前的

1·It is almost unheard-of for a new band to be offered such a deal.

一支新乐队得到这样的待遇，几乎是空前的。《牛津词典》