noun ダウンロード 🔗共有 出生率 The ratio of total live births to total population for a specific community or nation in a specified period; often expressed in births per thousand per year Examples : "The birthrate in the city has been declining steadily for the past five years. " 過去5年間、その都市の出生率は着実に低下しています。 statistics society number family AIとチャット語彙ゲーム読解練習
