动词
中文翻译：沉思
同义词：
['muse', 'contemplate', 'ponder']
例句：
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1. She mulled over the decision for hours before making a choice.
她深思熟虑了几个小时才做出决定。
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2. The scientist mulls over his findings in the lab every day.
科学家每天在实验室里仔细研究他的发现。
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3. The artist spent hours mulling over the sketches and drawings.
艺术家花了很多时间仔细审视草图和素描。