他通过每天练习钢琴来磨练自己的演奏技巧。

He ___honed his piano skills by practicing every day.

他花了一下午时间磨刀，让它变得锋利无比。

He spent the afternoon ___honing the blade to make it razor-sharp.

他通过每天练习将厨艺磨练到了完美境界。

He ___honed his cooking skills to perfection through daily practice.