形容词
中文翻译：频繁的
同义词：
['constant', 'frequent', 'regular', 'often']
例句：
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1. Heis a frequent visitor to the city.
他经常来这个城市。
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2. The teacher frequently checkson her students' progress.
老师经常检查学生们的进步。
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3. This restaurant has frequented bymany tourists.
这家餐馆经常有游客光顾。