“甜度”常见的英文表达是 sweetness。
例如：
We can adjust the sweetness of this dessert according to your preference.（我们可以根据你的喜好调整这道甜点的甜度。）
This wine has a perfect balance of acidity and sweetness.（这款葡萄酒酸度和甜度达到了完美的平衡。）