incidencen.发生(率);入射
incidence masons发病原因
incidence degree关联度
incidence number关联数
incidence matrix关联矩阵
incidence numbers关联数
incidence mapping关联映射
incidence of duty关税负担者,关税归宿
incidence formula关联公式
incidence density发病密度
Incidence monitor发病监测