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.

此后，肪酸转化成酮体，比如酰酸、β-羟基丁酸；酰酸是一种酮酸，因为它有酮基团和羧酸基团。

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.

β-羟基丁酸虽说也是酮体，但却不是酮酸，因为它的酮基团被还原成了羟基。

While carboxylic acids are ketones bonded to an OH group instead of an R group, and ethers are just alcohols bonded to an R-group instead of a hydrogen.

虽然羧酸是酮与一个羟基（OH）相连不是与R基团相连，醚则是醇与一个R基团相连不是与氢原子相连。