一心二用yīxīn'èryòngMeanings1. to do two things at once (idiom)2. to multitask3. to divide one's attentionCharacters used一one心heart二two用to useExamples2我wǒ不能bùnéng一心二用yīxīn'èryòng。I can't do two things at a time.你nǐ不能bùnéng一心二用yīxīn'èryòng。You can't do two things at once.