dunno /dəˈnoʊ/
Learner's definition of DUNNO
—
used in writing to represent the sound of the phrase don't know or I don't know when it is spoken quickly（用于书面语，表示短语don't know或Idon't know说快时的发音）不知道 ◊ The pronunciation represented by dunno is common in informal speech. The written form should be avoided except when you are trying to represent or record such speech.*dunno常见于非正式口语中，书面语应尽量避免使用，除非想要形象地表现或记录此种讲话。