The association seems to have been with a female dog in heat.
这看起来和正处于发情期的母狗有关。After thirty years of the same job, he feels he is in a rut, and he wants a change.
经过三十多年的同样的工作，他觉得他是在一个发情期，他希望改变。period for the election of her husband masters, the eyes of a certain good, not anxious to lock.
如果自家的一条母獒到了发情期，主人为其选夫婿，看中某条好公獒，先别着急锁定。Two or more ova are shed during the same heat period.
在同一发情期排出两个或数个卵子。In fact, the male jaguar joins the female for only a few days, and that's when she is in season.
实际上雄豹和雌豹在一起只有几天时间，而那只是在雌兽的发情期。He should probably have been culled once the rut was over and may have started mating with his own offspring.
可能发情期已过就应该被杀掉，它可能开始与自己的后代交配了。Or do they find women more appealing when they are in estrus, just as other male mammals are drawn to estrus females?
还是认为妇女在发情期更美丽动人，正如其他雄性哺乳动物那样被发情期雌性所吸引？If the birth date isn't a good time, wait until the next heat cycle to breed.
如果生产日期不是太好的话，那么你可以等到下一个发情期再进行繁育。So why not get out and collect some frog spawn , spot a mad March hare or listen for the first cuckoo?
所以为什么我们不出去走走呢？可以收集一些蛙卵，看看发情期发疯的野兔，听听第一声布谷鸟叫。