动词
中文翻译：调整
同义词：
['tune', 'adjust', 'calibrate']
例句：
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1. The piano needs tuning before the performance.
在演出前，钢琴需要调音。
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2. The radio was tuned to a different frequency.
收音机被调到了一个不同的频率。
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3. The engineer adjusted the gears to make sure everything worked smoothly.
工程师调整了齿轮以确保一切顺利运行。