动词短语
中文翻译：保持清醒
同义词：
['hold a spell', "keep one's wits about him/her"]
例句：
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1. She kept a spell on the audience to make them listen to her speech.
她保持了对观众的专注，使他们听她的演讲。
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2. The magician kept a spell on the audience by performing his trick.
魔术师通过表演他的把戏来保持观众的专注。
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3. During the presentation, the speaker kept a spell on the audience with his engaging delivery.
在演讲期间，演讲者用他引人入胜的表达方式保持了观众的专注。