adjective ダウンロード 🔗共有 古生代の Of a geologic era within the Phanerozoic eon that comprises the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian periods from about 542 to 250 million years ago, from the age of trilobites to that of reptiles. Examples : "My daughter is learning about the Paleozoic era in her Earth Science class, studying fossils of sea creatures from that ancient time. " 私の娘は地学の授業で古生代について学び、その古代の時代の海の生物の化石を研究しています。 geology age time history science AIとチャット語彙ゲーム読解練習
