normal metabolism的用法和样例：
例句
- Ketone bodies are normal products of the metabolism of fat in the liver.
酮体是肝内脂肪正常代谢产物。 - When bacteria enter the detector, their normal metabolism cleaves an inactive nutrient into an active one, allowing the detector's spores to germinate.
当细菌一进入侦测器后，细菌的正常代谢反应就会将一种不活化的营养物质，裂解成有活性的东西，促使侦测器内的孢子开始生长。
