unprecedented 美 [ʌnˈprɛsɪˌdɛntɪd] adj.空前的;前所未有的
英文释义:
that has never happened, been done or been known before
双语例句:
This achievement is surely unprecedented.
这成就确实是空前的。
China's industry is developing at an unprecedented rate.
中国工业正以空前的速度发展。
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