Males and females only commingle during mating season, otherwise they live solitary existences.
公兽和母兽只有在交配季节才混，否则他们分开独自居住。
Cranes take from four to seven years to mature before they pair up.
鹤要四至七岁才成熟交配。
The mating rituals of the cubera snappers have nothing, though, on squid.
古布拉金线鱼的交配仪式没有什么看头，但鱿鱼就不同。
Polyandrous - A mating system in which females mate multiple males.
Polyandrous -种交配系统，其中女性队友多男性。
Birds pair and build nests in spring.
鸟在春天交配、筑窝。
The queen bee is likely to mate with two or three drones.
后蜂可能会与两三只雄蜂交配。
It is often difficult to get animals to mate in captivity.
常常很难使被关的物交配。
The hybrid from a donkey and a horse is called a mule.
驴和马交配生的杂种叫骡子。
A tigon is a cross between a tiger and a lion.
虎狮是老虎和狮子交配的产品。
Many birds mate in the springtime.
许多鸟在春天交配。
90. The mating system can be changed in a quick and simple manner, from monoecy to dioecy.
用较快而简洁的方法使交配系统从雌雄同株变成雌雄异株。
Birds mate in spring.
鸟在春天交配。
The male shows elongated rays in its anal fin and yellow pearl organs on the jaws and opercula during breeding season.
雄鱼的臀鳍鳍条特长，交配季节两颌和鳃盖会长的珠星。
Most seed orchard theory is based on the assumption that panmixis will occur and that selfing will not be a serious problem.
大多数关于种子园理论，是以假定能发生随机交配和自花受精而不会成为严重问题为依据的。
After mating and oviposition, statistics showed that the higher of the percentage of small eggs is, the more of the unlaid eggs is.
交配产卵后，初步统计发现小卵百分率越大，则遗腹卵有越多的倾向。
The grass grows and the horse is ruttish, how reasonable the natural is in turn. The copulation in mule market has become the common thing.
草长马发情，这种自然界的交替是多么合乎情理。骡马市上的交配也就成了情理之事。
Homosporous ferns produce sporophytes by intra gametophytic selfing, inter gametophytic mating, or apogamy.Gametangium ontogeny, genetic load, and ploidy affect the mating system of each species.
摘要同型孢子蕨类的孢子体可经由同配子体自交、异配子体交配两类配育系统或以无配生殖的方式产生，异配子体交配又可分为异配子体自交和异配子体异交两种方式。
Q.I have a soft-drink bottle cap with a trivia item printed inside that says that if a sheep and a goat mate, the offspring is a geep.
我有个内印有琐事条目的软饮料瓶帽，上面写着，如果只绵羊与只山羊交配，其后代即是只山绵羊（吉普羊）。
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When he finds one, he alights and mates.
当它找着了，就降落下来交配。
There's not an animal on this planet that will copulate with anything that comes along.
世界上任何一种动都不会饥不择食地寻找行交配。
It's the mating season and male paddy frogs are competing for the attention of females.
现在是交配的季节，雄禾田蛙们为了吸引异性而卖力高鸣。
But for male birds, music is actually part of a testosterone-fueled mating ritual.
但是对于雄鸟而言，歌声实际上只是雄性激素引发交配仪式的一部分内容。
Mayflies come out of rivers or streams where they develop to mate.
蜉蝣从河流或溪流中孵化出来行交配。
No one has reported seeing narwhals eat or mate underwater.
从来没有人目睹独角鲸在水下食或交配。
It is presumed that early males and females had sex with many partners.
据推测，早期的人类会与许多异性交配。
Inbreeding is when a young animal is born from closely related parents.
近交配是指幼缘关系密切的父母繁殖而来。
They come together to mate in spring and early summer.
他们在春天和初夏才聚在一起行交配。
At mating time the males are noisy and quarrelsome.
在交配季节，雄性考拉会变的很吵且好斗。
From an evolutionary perspective getting out there and mating would increase the odds of predation.
从化的角度来看，外出交配会增加被捕食的几率。
And it is an important factor in their mating decisions.
这也是它们的交配抉择中的重要考量因素。
So that was an advertisement call from the peak of the mating season.
这是交配季节正盛时的求偶声。
They mate, they lay eggs and they die.
它们交配、产卵，然后死亡。
And that's the sound of the mating call so they can respond to us.
这是交配的声音信号，这样它们就会对我们做出回应。
Hares have long been thought to behave excitedly in March, which is their mating season.
人们一直认为野兔在三月会变得兴奋异常，因为三月是它们的交配季。
Laysan albatrosses mate for life. They lay one egg a year.
黑背信天翁一生只与一名伴侣交配。每只产一枚蛋。
The Gordian worm needs water to mate, but the cricket prefers dry land.
蠕虫需要水交配 但蟋蟀喜欢乾燥的土地。
They use vocalizations for mating and territorial displays and to coordinate group movements.
它们利用发声来行交配和领地捍卫，还有协调群体行动。
And for a successfully mated female, her work is only beginning.
而对成功交配的雌蚁而言，她的工作才刚拉开序幕。
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，否则他们分开独自居住。
10月合集 
物
的杂种叫骡子。
的珠星。
都不会饥不择食地寻找
行
雄性激素引发
只产一枚蛋。
