草原田鼠作为一种社会性生物，它是仅存3%的“一夫一妻制”哺乳动物中的一类。
The prairie vole is a sociable creature, one of the only 3% of mammal species that appear to form monogamous relationships.
Trivers-Willard 假说提出：贫穷的母亲更容易生女孩。我们将其应用到一个研究母亲状况的新方法中—即在一夫多妻制家庭中妻子的地位。
We apply the Trivers-Willard prediction - that mothers in poor condition will overproduce daughters - to a novel measure of condition, namely wife rank within a polygynous marriage.
不像其他的鱼类，它们是一夫一妻制并终生厮守。
Unlike most other fish, they are monogamous and mate for life.
他们没有证明一夫一妻制会使物种趋向群居。
They do not prove that monogamy predisposes species towards eusociality.
很多人显然对一夫一妻制存在着误解。
There are apparently some misconceptions about this whole monogamy thing.
垂体后叶加压素，一种抗利尿激素，又是一种与一夫一妻制的长久关系形成有关的化学物质（见“钟情者只有我们吗？”）
Vasopressin, an antidiuretic hormone, is another chemical that has been associated with the formation of long-term, monogamous relationships (see "Are We Alone in Love?").
显然哺乳动物的一夫一妻制天性很薄弱。
我们对一夫一妻制的理解主要来自鸟类而非哺乳类。
Our understanding of monogamy draws heavily on birds rather than mammals.
一夫一妻制不能绝对保证安全，除非你们都检查过身体且HIV都呈阴性。
Monogamous relationships don't guarantee absolute safety unless you've both been tested and are HIV-negative.
她全心全意，百分之百的相信一夫一妻制。
She believes, with all her heart, in monogamy - 100% conviction.
一夫多妻制并不会创造额外的老婆，只会改变婚配机制。
Polygamy does not create extra wives - it just changes the dynamics of who marries whom.
对他们来说，一夫一妻制既不新颖也不陌生。
有一种理论认为，两足动物的进化与核心家庭有关：一夫一妻制的父母合作照顾他们的后代。
One theory is that bipedality evolved in conjunction with the nuclear family: monogamous parents cooperating to care for their offspring.
和研究人员怀疑的一样，在其他条件相同的情况下，一夫一妻制的家庭育有更多的儿子：平均每生出100个女儿，就会生出101个儿子。
As the researchers suspected, when all other things were equal mothers in monogamous marriages had most sons: 101 for every 100 daughters.
孔子的“孝道”，不仅是宗法社会制度的反映，也是一夫一妻制家庭中父母与子女血缘关系的反映。
Confucius' filial piety was the reflection of both the patriarchal clan social system and the blood tie between parents and children in monogamous families.
这些类似老鼠的生物是哺乳动物中少数（不到5%）有人类一般的一夫一妻制倾向的动物之一。
These mouselike creatures are among the small minority of mammals — less than 5 percent — who share humans’ propensity for monogamy.
法国认为一夫多妻制是“对男女平等原则的严重违反”。
France considers polygamy "a grave infringement of the principle of equality between men and women".
虽然当地法律认同一夫多妻制，但这种婚礼仍属罕见。
Although South African law recognizes traditional polygamous marriages, simultaneous weddings are rare.
在19个一夫多妻制物种样本中，16个物种的雄性中，各个年龄阶段的样本在给定的时间段中都比雌性更易死亡。
In 16 of the 19 polygynous species in their sample, males of all ages were much more likely to die during any given period than were females.
这些类似老鼠的生物是哺乳动物中少数(不到5%)有人类一般的一夫一妻制倾向的动物之一。
These mouselike creatures are among the small minority of mammals - less than 5 percent - who share humans' propensity for monogamy.
他断言，在当今社会，人们无法以传统作为实行一夫多妻制或是裹小脚的理由，同理，那些仅仅靠传统为论据是论证是站不住脚的。
And he maintains that arguments which lean on tradition alone are inadequate, for the same reason that tradition cannot, nowadays, justify polygamy or footbinding.
一夫一妻制不仅是可能的，而且是必要的。孩子们必须有所依靠；你也必须有所依靠。
Monogamy is a possibility - and a necessity. Kids have got to have something they can rely on. You have got to have something you rely on.
在哺乳动物中，它的与众不同之处在于它既是群居性的，也实行一夫一妻制。
What makes it unusual among mammals is that it is both sociable and monogamous.
然而，在很多非西方社会，一夫一妻制从未占主导地位。
In many non-Western societies, however, monogamy has never dominated.
富裕国家的人重视一夫一妻制，并倾向于不经常出轨。
People in rich countries value monogamy and tend not to stray often.
富裕国家的人重视一夫一妻制，并倾向于不经常出轨。
People in rich countries value monogamy and tend not to stray often.
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