estrous cycle
US /ˈes.trəs ˌsaɪ.kəl/
UK /ˈiː.strəs ˌsaɪ.kəl/
名词
发情周期
the recurring physiological changes induced by reproductive hormones in most mammalian placental females
示例:
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The veterinarian studied the mare's estrous cycle to determine the best time for breeding.
兽医研究了母马的发情周期，以确定最佳繁殖时间。
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Understanding the estrous cycle is crucial for successful animal breeding programs.
了解发情周期对于成功的动物繁殖计划至关重要。