maternally          
adverb uk/məˈtɜː.nəl.i/ us/məˈtɝː.nəl.i/
 母親般地
in the way that is like or relates to a mother
  She is always maternally protective. 她总是像母亲一样保护弱小。 
 “Hey, baby, how are you doing?" she called maternally. “嘿,宝贝,你好吗?”她用母亲般的口吻叫道。 
  母亲一方地;母系地
in a way that relates to the mother's side of a family
  They trace their ancestry maternally.  他们查考母亲一方的祖先。 
 We are all maternally linked cousins. 我们都是母亲一方的表亲。 
 See: maternal
 - More examples
 - It was touching to see how maternally she treated him.
 - One hand cupped his son’s head almost maternally.
 - Mitochondrial DNA is a type of DNA that is maternally inherited.