To hear an oriole sing May be a common thing Or only a divine It is not the bird Who sings the same unheard, As unto crowd.

VOA: special.2010.07.18

In rare, but not unheard of, cases, some people begin to have those unusual biological processes and then return to the normal biological processes and can talk about what was happening in the unusual biological processes.

在少见,但并非从未听闻的,情况下,有些人开始,经历那样一些不正常的生理过程,然后回归正常的生物学过程,他们可以谈论,在那个不正常的生物过程里发生了什么

耶鲁公开课 - 死亡课程节选

The Athenians loved and respected him so much that they gave him the almost unheard honor of burying him right on the spot where he fell in the field, and thereafter, his name was always followed with glory, admiration and devotion.

雅典人民深深爱戴这位国王,因而给予他前所未闻的最高的殊荣,把他安葬在战场上他牺牲的地方,从此以后,他的名字总是和光荣,尊敬,还有赤诚联系在一起

耶鲁公开课 - 古希腊历史简介课程节选

Developed unheard of addictions; unintentionally using needles shooting up intoxications;

VOA: special.2009.04.17

Many of these models were unheard of just 10 or so years ago.

VOA: standard.2010.03.17