noun🔗Share光年A unit of length (abbreviation ly; equal to just under 10 trillion kilometres (1016 metres)) equal to the distance light travels in one Julian year; used to measure extremely large distances."Astronomers estimate that the galaxy is about 100,000 ly across. "天文学者は、その銀河の幅は約10万光年だと推定しています。astronomyphysicsspaceunitsciencemathChat with AIVocabulary GamePractice Reading
noun🔗Share長距離(only in plural) A very long way."The marathon runner in the lead is light years ahead of the one at the back."先頭のマラソンランナーは、後ろのランナーより光年単位で先を走っている。wayspaceplaceChat with AIVocabulary GamePractice Reading
noun🔗Share長い年月(only in plural) A very long time."Some of Leonardo da Vinci’s inventions were light years ahead of their time."レオナルド・ダ・ヴィンチのいくつかの発明は、長い年月、時代を先取りしていた。timepastChat with AIVocabulary GamePractice Reading
