此外，还有一些生物遵循所谓的“周期性孤雌生殖”规律，例如水蚤就是交替进行孤雌生殖和有性生殖的。
Then there 's something called cyclic parthenogenesis in which organisms such as water fleas alternate back and forth between mating and non-mating reproduction .
周期性孤雌生殖