Leavener 膨張剤(ぼうちょうざい)(= leavening agent (such as sourdough, yeast, baking powder)) Leaveners produce tiny air bubbles (mainly carbon dioxide) which help foods that are baked or cooked to rise. 膨張剤は小さな気泡(主に二酸化炭素)を生成し、焼いたり調理したりした食品が盛り上がるのを助けます。 https://talkenglish.xsrv.jp/wp-content/uploads/2018/10/Leavener.mp3