「一挙両得」の意味と例文 https://noteolsen.com/2023/02/03/%e3%80%8c%e4%b8%80%e6%8c%99%e4%b8%a1%e5%be%97%e3%80%8d%e3%81%ae%e6%84%8f%e5%91%b3%e3%81%a8%e4%be%8b%e6%96%87/