unprecedented
/ənˈprɛsɪˌdɛntɪd/
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adj. 前所未有的；空前的
- Profits reached an unprecedented level this year, more than double those of any previous year. 今年獲利達到前所未有的水準，比過去任何一年都多出一倍以上。
其他意思
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adj. 前所未有的, 空前的
If something is unprecedented, it has never happened before.
- Such a move is rare, but not unprecedented
也出現在：
字根
cede, ceed, cess, ced, ceas, cest 走；讓步
un + pre + ced + ent + ed不、相反 + 在前面、事先 + 走 + 形容詞；人 + 形容詞