Birds pair and build nests in spring.

鸟在春天配、筑窝。

Cranes take from four to seven years to mature before they pair up.

鹤要四至七岁才成熟配。

It is often difficult to get animals to mate in captivity.

常常很难使被关的动物配。

A tigon is a cross between a tiger and a lion.

虎是老虎和配的产品。

The queen bee is likely to mate with two or three drones.

后蜂可能会与两三只蜂配。

The hybrid from a donkey and a horse is called a mule.

驴和马配生出的杂种叫骡。

Many birds mate in the springtime.

许多鸟在春天配。

Polyandrous - A mating system in which females mate multiple males.

Polyandrous -一种配系统，其中女性队友多男性。

The mating rituals of the cubera snappers have nothing, though, on squid.

古布拉金线鱼的配仪式没有什么看头，但鱿鱼就不同。

Males and females only commingle during mating season, otherwise they live solitary existences.

公兽和母兽只有在配季节才混到一起，否则他们分开独自居住。

Birds mate in spring.

鸟在春天配。

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配系统从雌同变成雌。

The male shows elongated rays in its anal fin and yellow pearl organs on the jaws and opercula during breeding season.

鱼的臀鳍鳍条特长，配季节两颌和鳃盖会长出黄色的珠星。

Most seed orchard theory is based on the assumption that panmixis will occur and that selfing will not be a serious problem.

大多数关于种园理论，是以假定能发生随机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.

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。

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.

摘要同型孢蕨类的孢体可经由同配体自、配体配两类配育系统或以无配生殖的方式产生，配体配又可分为配体自和配体两种方式。

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，这种自然界的替是多么合乎情理。骡马市上的配也就成了情理之事。

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.

我有一个内印有琐事条目的软饮料瓶帽，上面写着，如果一只绵羊与一只山羊配，其后代即是一只山绵羊（吉普羊）。