Question

unprecedented adj.空前的 The root of this word is precedent, a noun referring to something done or said that is used as an example to be followed in the future. In law, a precedent is a legal decision that is used as a standard in future cases. So the adjective unprecedented, meaning "having no precedent," was formed from the prefix un- "not," the noun precedent, and the suffix –ed "having." ★★☆☆☆ 2006.1

Accepted Answer

[ʌn'presidentid] Something that is unprecedented is not known, experienced, or done before. If you've never gone on a family beach vacation but you're planning one now, you could refer to it as an unprecedented decision. Writing for the National Immigration Forum, Gregory Rodriguez reports that today’s immigration is neither at unprecedented levels nor resistant to assimilation. 1[ADJ 形容词]前所未有的；空前的；没有先例的 If something is unprecedented, it has never happened before. Such a move is rare, but not unprecedented...这种做法很罕见，但也不是没有先例的。In 1987 the Socialists took the unprecedented step of appointing a civilian to command the force.1987年，社会党人史无前例地任命了一位非军队出身的人来指挥军队。2[ADJ-GRADED 能被表示程度的副词或介词词组修饰的形容词]（质量、数量、规模）很高的，很大的 If you describe something as unprecedented, you are emphasizing that it is very great in quality, amount, or scale.   [usu ADJ n]  [emphasis]Each home boasts an unprecedented level of quality throughout...每家的质量都堪称一流。The scheme has been hailed as an unprecedented success.这个计划广受好评，被认为是一个巨大的成功。

英语单词	unprecedented
英美音标	[ʌn'presidentid]
中文释义	adj.空前的
vocab简明	Something that is unprecedented is not known, experienced, or done before. If you've never gone on a family beach vacation but you're planning one now, you could refer to it as an unprecedented decision.
vocab扩展	The root of this word is precedent, a noun referring to something done or said that is used as an example to be followed in the future. In law, a precedent is a legal decision that is used as a standard in future cases. So the adjective unprecedented, meaning "having no precedent," was formed from the prefix un- "not," the noun precedent, and the suffix –ed "having."
真题原句	Writing for the National Immigration Forum, Gregory Rodriguez reports that today’s immigration is neither at unprecedented levels nor resistant to assimilation.
柯林斯星级	★★☆☆☆
柯林斯解释	1 [ADJ 形容词]前所未有的；空前的；没有先例的 If something is unprecedented, it has never happened before. Such a move is rare, but not unprecedented... 这种做法很罕见，但也不是没有先例的。 In 1987 the Socialists took the unprecedented step of appointing a civilian to command the force. 1987年，社会党人史无前例地任命了一位非军队出身的人来指挥军队。 2 [ADJ-GRADED 能被表示程度的副词或介词词组修饰的形容词]（质量、数量、规模）很高的，很大的 If you describe something as unprecedented, you are emphasizing that it is very great in quality, amount, or scale. [usu ADJ n] [emphasis] Each home boasts an unprecedented level of quality throughout... 每家的质量都堪称一流。 The scheme has been hailed as an unprecedented success. 这个计划广受好评，被认为是一个巨大的成功。
来源	2006.1

Unprecedented Precedent Noun Immigration ʌn'presidentid Adj.空前的 Experienced Family