动词短语
中文翻译：在
同义词：
['practice on', 'practice at例句：1. She practised on the piano for hours every day.（她每天花几个小时在钢琴上练习。）']
例句：
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1. She practised on the piano for hours every day.
她每天花几个小时在钢琴上练习。
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2. The teacher advised us to practice on our weaknesses.
老师建议我们练习我们的弱点。
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3. We should practice on our mistakes before we make them again.
在我们再次犯错误之前，我们应该练习改正错误。