light millennium
Having a label, tagged. / Defined or described. / (chemistry) Having an atom replaced by a radioactive isotope
(astronomy, physics) A unit of length equal to the distance light travels in one millennium.
simple past tense and past participle of upclose
To catch live animals with traps.
天文学者たちは、新たに定義された光が千年で進む距離が星間距離を測る標準単位になるかどうかを議論した。
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