learn by heart
US /lɜrn baɪ hɑrt/
UK /lɜːn baɪ hɑːt/
成语
背诵, 牢记
to memorize something perfectly
示例:
•
She had to learn by heart all the lines for the play.
她必须背熟剧中的所有台词。
•
It's important to learn by heart the multiplication tables.
背熟乘法表很重要。