| 词汇 | unprecedented |
| 释义 | unprecedented adjective uk/ʌnˈpres.ɪ.den.tɪd/ us/ʌnˈpres.ə.den.t̬ɪd/ C2 史无前例的，空前的;绝无仅有的 never having happened or existed in the past This century has witnessed environmental destruction on an unprecedented scale. 环境在本世纪遭到了空前的破坏。
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