After that happens, the liver turns the fatty acids into ketone bodies, like acetoacetic acid and beta hydroxybutyric acid; acetoacetic acid is a ketoacid because it has a ketone group and a carboxylic acid group.

后，肝把脂肪酸转成酮体，比如乙酰乙酸、β-羟丁酸；乙酰乙酸是一种酮酸，因为它有酮团羧酸团。

Beta hydroxybutyric acid on the other hand, even though it's still one of the ketone bodies, isn't technically a ketoacid since its ketone group has been reduced to a hydroxyl group.

而β-羟丁酸虽说也是酮体，但却不是酮酸，因为它的酮团被还原成了羟。

Acetone has a ketone group and it's called 'acetone' because it was derived from acetic acid, which is vinegar, the most common carboxylic acid in your kitchen.

丙酮具有一个酮，它被称为“丙酮”是因为它是从醋酸中衍生出来的，而醋酸就是厨房中最常见的羧酸，也就是食醋。

By functional group I mean an alcohol group or ketone group or aldehyde group or acid group.

当我提到官能团时，指的是醇、酮、醛或羧酸。