名词
中文翻译：交配期
同义词：
['estrus', 'breeding season例句：1. The roe deer is in its proestrus period.（鹿处于发情期。）']
例句：
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1. The roe deer is in its proestrus period.
鹿处于发情期。
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2.During the proestrus period, the female deer will come out to find a mate.
在发情期，雌鹿会出来寻找配偶。
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3. The proestrus period is crucial for the survival of the species.
发情期对于物种的生存至关重要。