Before he began to play, Harry tuned up his banjo.
开始演奏前,

行
好
的班卓
。
音;
整,
节(发动机,使达到最佳状态)Before he began to play, Harry tuned up his banjo.
开始演奏前,

行
好
的班卓
。
She tuned up her piano.

好
钢
的音。
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