dilution

n.稀释物;冲淡物

复数：dilutions

柯林斯词典

N-COUNT 稀释物;冲淡物A dilution is a liquid that has been diluted with water or another liquid, so that it becomes weaker.'Aromatherapy oils' are not pure essential oils but dilutions.“香薰精油”并非纯精油，而是经过稀释的。