名词中文翻译
中文翻译：月经开始
同义词：
['menstrual period', 'menstrual commencement']
例句：
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1.The onset of menstruation is a natural part of the cycle.
月经的开始是生理周期的一部分。
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2.She was diagnosed with endometriosis, which can cause menstrual pain.
她被诊断出患有子宫内膜异位症，这可能导致月经疼痛。
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3. During menstruation, women often experience mood swings and fatigue.
在月经期间，女性经常经历情绪波动和疲劳。