But there were positive correlation with gestation age, day age and the volume of mile.

但随胎龄、日龄、奶量增加而升高，呈正相关。

youdao

But there were positive correlation with gestation age, day age and the volume of mile.

但随胎龄、日龄、奶量增加而升高，呈正相关。

youdao