Externalizing is significantly correlated with the proportion of child care provided by day-care centers, and this correlation does extend all the way through to the sixth grade.
外化与日托中心提供的对儿童的教养息息相关，而且这种相关性会一直持续到六年级。
2
And the frequency grade and rainfall of rainstorm have a positive correlation.
暴雨频次、等级、雨量的基本特征具有正相关关系；
3
Objective To investigate the correlation of the duration, severity and grade of diabetic retinopathy(DR) with the changes of keratoconjunctival epithelium in diabetic patients.