have a good ear for是什么意思？

对某事物有好的鉴赏，领悟能力
例如
He has a good ear for music.
他对音乐很有鉴赏力。

A writer with a good ear for dialogue; has an ear for foreign languages.
对对话很敏感的作家；对外国语言的高领悟力

有好的听力。