protoconversationWiktionary 原文构词拆分proto-前缀An early, primitive stage of development. · Original, older.+conversation词根/词干词源说明From proto- + conversation.释义（英文）名词 NounAn interaction between an adult (typically a mother) and baby, that includes words, sounds and gestures, that attempts to convey meaning before the onset of language in the child词族相关词（1）