这位年轻的钢琴家以不倦的热忱反复练习那段困难的乐句，直到天亮。
The young pianist practiced the difficult passage with relentless ardor, repeating it until dawn.
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解释
ardor 指对技能或艺术练习的狂热投入和执着。
The young pianist practiced the difficult passage with relentless ardor, repeating it until dawn.
ardor 指对技能或艺术练习的狂热投入和执着。