shàng kè / shí / yī xīn èr yòng / jì / tīng / yīn yuè / yòu / jì / bǐ jì / xiào guǒ / wǎng wǎng / bù hǎo

上课时一心二用，既听音乐又记笔记，效果往往不好。

Multitasking in class, listening to music and taking notes at the same time, is often ineffective.