maternal grandfather 外公
maternal grandmother 外婆
paternal grandfather 爷爷
paternal grandmother 奶奶
普遍不用区分那么清
用grandfather
grandmother 即可
而granddad
grandma 比较口语
maternal grandfather 外公
maternal grandmother 外婆
paternal grandfather 爷爷
paternal grandmother 奶奶
普遍不用区分那么清
用grandfather
grandmother 即可
而granddad
grandma 比较口语