evanescencen.
英 ,iːvə'nesəns | 美
中文n. 逐渐消失；瞬息；幻灭
词根词源
evanescence (n.)1751, "process of gradually vanishing;" see evanescent + -ence. Meaning "quality of being evanescent" is from 1830. Evanescency is attested from 1660s.
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