paceboardWiktionary 原文1词源 1构词拆分pace词根/词干+board词根/词干词源说明From pace + board.释义（英文）名词 Noun(medicine) A board marked with symbols, used to help a person with multiple sclerosis to time their speaking so as to be clearly intelligible.2词源 2释义（英文）名词 NounObsolete form of pasteboard.