noun · the physical body of a mother or female parent, especially in the context of pregnancy or gestation

胎儿通过脐带从母体汲取养分。

noun · the original source substance, structure, or matrix from which others are derived or contained

这种派生化合物保留了其母体的基本结构。

noun · the entire set of individuals or items from which a statistical sample is drawn

统计学中的样本必须能代表母体的特征。