noun🔗Share時代, 紀元A time period of indeterminate length, generally more than one year."Several eras of my family's history are documented in old photo albums. "私の家族の歴史のいくつかの時代は、古い写真アルバムに記録されています。timeperiodhistoryageChat with AIVocabulary GamePractice Reading
noun🔗Share時代A unit of time, smaller than eons and greater than periods."The Mesozoic and Cenozoic are two of the most well-known eras in the history of Earth. "中生代と新生代は、地球の歴史の中で最もよく知られている2つの時代です。timehistorygeologyageChat with AIVocabulary GamePractice Reading
