light second
(astronomy, physics) A unit of length equal to the distance light travels in one second: approximately 300,000 kilometers
Third-person singular simple present indicative form of symbol
plural of spirohydantoin
One of 77 counties in Oklahoma, United States. County seat: Cherokee.
天文台は彗星の尾がほぼ1光秒にわたって伸びていると測定し、通過する天体としては驚くほどの大きさだった。
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