In heavy oil, not only the absolute concentrations but also the ratio indicators of neutral nitrogen compounds are too low to distinguish the oil migration path.
重质油中，无论是中性含氮化合物的绝对浓度或是其比值指标都降低，严重影响了原油运移途径的判别。
Preserved liver, kidney, pancreas, adipose tissue in liquid nitrogen, and collected the liver, pancreas to 10%neutral formalin-fixed.
留取肝脏、肾脏、胰腺、脂肪组织以液氮保存，并留取肝脏以10%中性福尔马林固定。
Preserved liver, kidney, pancreas, adipose tissue in liquid nitrogen, and collected the liver, pancreas to 10%neutral formalin-fixed.
留取肝脏、肾脏、胰腺、脂肪组织以液氮保存，并留取肝脏以10%中性福尔马林固定。
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