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。

youdao

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。

youdao

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。

youdao

Some American parents argue that the vaccine will make their girls more likely to have sex early.

VOA: special.2009.04.01

So this is where you'd go to relax, to make a business deal, to meet your friends, to chat, to try to have sex, try to meet somebody.

人们可以在那儿得到放松，谈谈生意，见见朋友，聊天，性爱，约会。

耶鲁公开课 - 新约课程节选

It is a symbol of their belief in waiting until marriage to have sex.

VOA: special.2009.06.19

Spontaneity is great, but 80% of married couples schedule time to have sex, says Dr. McCarthy preferably when not dead tired.

WSJ: How to Talk to Your Spouse About Improving Your Sex Life

And he's getting a new comedy "The Money Shot, " about a Hollywood movie set where the actors are asked to have sex for real ready for a Broadway landing in the fall.

WSJ: Neil LaBute play highlights off-Broadway festival

Sexual mores can shift quickly: American women reared during the nineteen-sixties were nearly ten times as likely as those reared earlier to have had sex with five or more partners before the age of twenty, according to a 1994 study.

NEWYORKER: It Ain��t Necessarily So