scribble absent-mindedly
(心不在焉地)乱涂
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he was only doodling in the margin .他只是在空白处乱画。
a rough drawing made absent-mindedly
(心不在焉地)乱涂的图画。
"early 17th cent. (originally as a noun denoting a fool, later as a verb in the sense ‘make a fool of, cheat’): from Low German