性交

Sexual intercourse plays a major role in Bonobo society, being used as a greeting , a means of conflict resolution and post-conflict reconciliation , and as favors traded by the females in exchange for food.

性交在bonobo的社会中扮演一个重要的角色，而且是被当作一种问候，解决冲突跟和解决地位冲突，和作为雌性用来交换食物的喜爱对待。

As I note in a previous post , such men receive disproportionate opportunities for extra-pair copulations and short-term mating because women typically seek them out for their high-quality genes.

正如我在以前的文章中说过的那样，这样的男人拥有更多伴侣外性交和短期交往的机会，因为女人常常为其高质量基因而选中他们。

Over time, methods such as rhythm method (based on calculating the woman's fertile period and abstaining from sex during it) became common.

随着时间的过去，很多方法例如韵律法（基于计算女人的排卵期并且在此期间避免性交）变的很普遍。

Fertility awareness techniques have evolved from keeping track of the menstrual cycle (the so-called " rhythm method") to avoid intercourse around the time of ovulation

危险期推算法是估算排卵期，这样就可在这每月中妇女最易受孕的大约六天内避免性交。

This is usually in response the the vagina or vulva being touched during sexual intercourse or during a gynaecological examination.

阴道痉挛是周围的肌肉阴道收紧，非自愿性，这是通常在回应的阴道或外阴被感动，在性交或在妇科检查。

I just dont understand why if the risk of HIV in heterosexuals is so low there are so many people infected this way.

我实在不明白为什么假如HIV在异性性交传播的危险那么小，仍然有那么多人通过这个途径感染？

Cervical factor infertility is suggested when welltimed PCTs are consistently abnormal in the presence of a normal semen analysis.

如果时间选择合适的性交后试验持续异常而精液分析正常时就要考虑宫颈因素引起的不孕。

I just employed the most ancient form of birth control Coitus Interruptus, as the Romans called it.

我刚才使用最古老的避孕法，那就是古代罗马人所称的性交中断法。

J/ z I just employed the most ancient form of birth control Coitus Interruptus, as the Romans called it.

我刚才使用最古老的避孕法，那就是古代罗马人所称的性交中断法。

S t/ E; U% Z3 J4 W y I just employed the most ancient form of birth control Coitus Interruptus, as the Romans called it.

我刚才使用最古老的避孕法，那就是古代罗马人所称的性交中断法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。