never heard it before;never heard of before;unheard-of ;

During the Japanase war, land became concentrated to an unheard of degree in modern China.
在抗日战争时期, 土地集中达到了近代中国前所未闻的程度.
来源:互联网摘选Tese areas were not normally frequented by geologists and were unheard of at the freshman level.
这是些不仅初学者们前所未闻,就是地质学家通常也很少涉猎的领域.
来源:词典精选例句Bonds are pricing in unheard-of and devastating levels of default.
债券的价格也体现出这种 前所未闻 的、灾难性的违约水平.
来源:互联网摘选I imagine extraordinary intrigues and unheard of wines and passions.
我想象到一些不同寻常的私情和前所未闻的醇酒和情欲.
来源:词典精选例句It's unheard of for somebody so young to get a place at university.
这么年轻的人就在大学里应聘任职真是前所未闻.
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