You are playing Russian roulette every time you have unprotected sex.

每次你进行无保护措施的性爱都是在冒不可预料的风险。

Immediately relevant to game theory are the sex ratios in certain parasitic wasp species that have a large excess of females.

与博弈论直接相关的是某些具有大量过剩雌性的寄生蜂种类的性别比例。

The majority of sex offenders have a low opinion of themselves.

大多数性犯罪者自我评价都很低。

You have a choice of coed or single-sex swimming exercise classes.

你可以选参加男女混合或是非混合的游泳练习课。

Single-sex education can have enormous benefits for female students.

单一性别教育对女学生有巨大的好处。

It's normal for them to have some feelings for the opposite sex.

他们对异性有一些感觉是很正常的。

I think that it's grossly overstated that one needs to have contact with the opposite sex right through the whole of life, in the classroom and outside the classroom and at all ages.

我认为，所谓的一个人需要在一生中保持与异性的接触——无论是课堂上还是课堂外，无论处于哪个年龄段——这种观点过分夸大了。

Of course, there're many excellent single-sex schools out there, but as these careful research reviews have demonstrated, it's not their single-sex composition that makes them excellent.

当然，那里也有很多优秀的单性别学校，但正如这些谨慎的研究评论所表明的，使它们优秀的并不是单性别构成。

In the public sector, researchers have found either no sex differences in mobility or a larger female disadvantage in lower grades.

在公共部门，研究人员发现，在流动性方面没有性别差异，或者女性在较低的年级中处于更大的劣势。

You don't have to look far to find evidence of stereotyping and sex discrimination in single-sex schools.

在单性别学校里，你很轻易就能找到刻板印象和性别歧视的迹象。

Among the minority of studies that have reported advantages of single-sex schooling, virtually all of them were studies of girls.

在指出单性别学校教育优势的少数研究中，几乎所有的研究都是针对女孩的。