磨耳朵英语单词可以翻译为"sharpen your ears"。意思是使自己的听力变得更灵敏、更精细。例句:

Sharpen your ears and psten carefully to what I'm saying.
聆听我的话,磨耳朵。

你也可以使用其他表示同样意思的短语,例如:

Pay close attention to what's being said.
Listen closely.
Be all ears.

希望这些信息对你有帮助!