| 单词 | 极短 |
| 释义 | 〔supernova〕A rare celestial phenomenon involving the explosion of most of the material in a star, resulting in an extremely bright, short-lived object that emits vast amounts of energy.超新星：一种罕见的天文现象，表现为一恒星中的绝大部分物质爆炸后，产生能放射极大能量的极为明亮而存在时间极短的物体〔ephemeron〕ephemera Printed matter of passing interest. ephemera 只具有极短吸引力的印刷品〔picowave〕wave [from the extremely short wavelength of gamma radiation] wave [因γ射线的波长极短而得名] 〔ephemeral〕A markedly short-lived thing.生存极短时间的事物〔moment〕Instant is a period of time almost too brief to detect;it implies haste and often urgency: Instant 指一段极短时间，以至让人难以察觉；它暗指匆忙，并常指紧急情况： |
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