内源性粪钙的英文：
EFC, endogenous fecal calcium

efc是什么意思：
Equivalent Full Charge,全装药当量
endogenous是什么意思：
a. 内生的;内因性的

The reaction involves oxidation of endogenous glutathione to its disulfide.
该反应是内源性谷胱甘肽氧化成了它的二硫化物。

Every model includes exogenous and also endogenous variables which must be estimated
每一个模型都包括需要估计的外生变量和内生变量。

The institutional change is the coefficient result of exogenous variable and endogenous variable.
制度变迁的产生是外生变量和内生变量共同作用的结果。

fecal是什么意思：
a. 排泄物的,渣滓的

Diarrhea may occur around the impaction and often with fecal incontinence
在粪块嵌塞期间可发生腹泻，并常有大便失禁。

A dark green fecal material that accumulates in the fetal intestines and is discharged at or near the time of birth.
胎便汇集于腹部小肠中的一种深绿色渣滓物，并在出生时或将近出生之时排出