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unheard of 英 [ʌnˈhɜ:d ɔv] 　美 [ʌnˈhəd ʌv]

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unheard of

phrase. 前所未闻的；从未听说的；骇人听闻的　

He has brought the Census in on time and under budget, an unheard of accomplishment.　他在规定的时间和预算内完成了人口普查，这是一个前所未闻的成就。

And he began to wonder if he was seeing something virtually unheard of: forged fingerprints.　他开始怀疑自己是否看到了几乎闻所未闻的东西：伪造指纹。

1. He has brought the Census in on time and under budget, an unheard of accomplishment.

他在规定的时间和预算内完成了人口普查，这是一个前所未闻的成就。
2. And he began to wonder if he was seeing something virtually unheard of: forged fingerprints.

他开始怀疑自己是否看到了几乎闻所未闻的东西：伪造指纹。
3. These days, many colleges have entrepreneurship programs that were unheard of 30 years ago.

那段时间，许多大学也开设了30年前闻所未闻的企业课程。