形容词
中文翻译：Unknown
同义词：
['periodical', 'periodic', 'cyclical', 'recurrent']
例句：
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1. Theproject is scheduled for completion in the next six months.
该项目计划在接下来六个月内完成。
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2.The moon has a period of about 29.5 days.
月亮有大约29.5天的周期。
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3.The temperature varies with the season, showing a periodic pattern.
温度随着季节变化而变化，呈现出周期性的模式。