Withtheconclusionofaburstactivity,thelacticacidlevelishighinthebodyfluids,leavingthelargeanimalvulnerabletoattackuntiltheacidisreconverted,viaoxidativemetabolism,bytheliverintoglucose,whichisthensent(inpart)

Question

With the conclusion of a burst 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 .
这句话里的 动分leaving引导的直到句末的成分做lactic acid level
我想问的是：until这个状语从句的连词可以脱离主句单独使用吗?如果改成and the lactic acid level would leave the large animal vulnerable to attack 我能理解；leaving the large animal vulnerable to attack 不是一个完整的句子呢,不能叫主句.
leaving the large animal vulnerable to attack until the acid is reconverted .................................for glycogen resynthesis .
我是想请教既然until不能脱离主句存在，那这里的until的主句在哪？不是leaving the large animal vulnerable to attack 这不是一个句子。

Answer 1

lactic acid level是个名词 状语不修饰名词的呀.
是一个分词短语,表示伴随状态或者结果.不能成为句子,不能叫主句.