女人更喜欢具有异国情调的男子

音频: http://download.putclub.com/update/PreExtensive/5HoursLater/exoticmales.mp3
Don: Ah Ha! I just read a study that explains why all women seem to swoon over men with foreign accents!

Yaël: Whoa Don! That's a pretty broad generalization, don't you think?

D: Aww, I was just joking Yael. But actually, a study on spotted hyenas found that at least in some species, females really do prefer foreign males.

Y: Really? What's the story?

D: Scientists working in Tanzania tracked the reproductive success, or number of cubs fathered, of male hyenas. The scientists used genetic paternity tests to determine which male had fathered each cub born in the eight clans during a ten-year study period. Hyenas live in social groups called clans. Most, but not all males, leave the clan into which they were born. Females, on the other hand, rarely leave their birth clan. Using the genetic markers, scientists found that almost ninety-percent of the females mated with males that had immigrated from another clan, or were born into the clan after the female was born. In other words, females preferred to mate with males that they didn't recognize as being from their birth clan. And since young, inexperienced females were less likely than older females to recognize the males from neighboring clans, males looking for mates were most successful if they moved to a clan with lots of young females -- even if the clan were close by.

Y: I guess it makes sense for the males to leave home, since females prefer foreigners. But what benefit is there for the females?

D: By having a "rule" that unfamiliar males are better, females can usually avoid inbreeding---without needing to evolve a more elaborate mechanism to identify close relatives. 

swoon over   to be extremely excited and unable to control yourself because you admire someone so much

generalization   the act of bringing individuals or particulars under a genus or class; deduction of a general principle from particulars. 概括

spotted  having small round marks of a different color on the surface 带斑点的

species   a group of animals or plants whose members are similar and can breed together to produce young animals or plants 物种

Tanzania   坦桑尼亚(东非国家)

reproductive success  繁殖成功（率）

father  (vt.) to become the father of a child by making a female pregnant

paternity   the fact of being the father of a particular child, or the question of who the child's father is 作为父亲的状态；父亲的身份

clan    a large group of families that often share the same name 宗族，部落，家族

inexperienced   not having had much experience

neighboring   near the place where you are or the place you are talking about

elaborate   having a lot of small parts or details put together in a complicated way

mechanism   a system that is intended to achieve something or deal with a problem

hyena   土狼，鬣狗：非洲和亚洲狼科中几种食肉哺乳动物的任何一种，吃食与食腐动物一样，颚有力，后腿相对较短，毛发粗糙