他能凭记忆演奏那首曲子。

He can ___play that tune ___by ___ear.

许多爵士乐手凭记忆演奏复杂的旋律。

Many jazz musicians ___play complex melodies ___by ___ear.

学习凭记忆演奏歌曲很有挑战性。

Learning to ___play songs ___by ___ear is challenging.