1.The riddle of a dog's oestrum is a very special scenery, especially those who has a female dog in the family, it is really a wonder.
狗的反群之迷的确是狗的最独特的风景线，特别是家里有小母狗的朋友，那可真是一大奇观了。
2.The rate of cow's oestrum fecundation is one key factor of cattle's breeding rate.
奶牛情期受胎率是影响奶牛繁育率的重要因素之一。
3.Application of Embryo Transfer Technology to Rural Normal Oestrum Cows
自然条件下牛胚胎移植技术的推广应用