noun 下载 🔗分享 内酯, 环酯。 A cyclic intramolecular ester derived from a hydroxy acid. Examples : "The scientist synthesized a new lactone from a hydroxy acid, hoping its ring structure would give it unique properties for drug delivery. " 这位科学家用羟基酸合成了一种新的内酯,希望其环状结构能赋予它独特的药物传递性质。 compound chemistry biochemistry substance 与AI对话词汇游戏阅读练习