有些多羟糖醇是有营养的，有些则无营养。

Some aditols are nutritionally available; others are not.

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醛糖或酮糖被还原后变产生糖醇，确实的叫法为“多羟糖醇”（alditols），HOCH 2 -（CHOH）n-CH 2 OH。

Reduction of aldoses or ketoses yield sugar alcohols ,properly called ‘alditols,” HOCH2-(CHOH)n-CH2OH.

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提取物中总黄酮和多酚类物质的含量与清除羟自由基能力有密切关系。

There are close connection between the hydroxyl radical scavenging activity and flavonoids content or polyphenols content.

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