GRE：核心词组之a,burst,of_burst词组

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a burst of 短时间内大量的
　　释义
　　A burst of something is a sudden short period of it.
　　例句
　　A burst of machine-gun fire broke the tranquil night.
　　GRE
　　With the conclusion of a burst of activity, the lactic acid level is high in the body fluids, leaving the large animal vulnerable to attack until the acid is reconverted, via oxidative metabolism, by the liver into glucose, which is then sent (in part) back to the muscles for glycogen resynthesis.
　　随着短时间内大量活动的终止，体液中的高浓度乳酸使得大型动物变得虚弱，易于遭受攻击，直至乳酸在肝脏中被氧化代谢转化为葡萄糖后，一部分葡萄糖进一步被运至肌肉中进行糖原的合成，大型动物才能得以恢复体能。