Second, because only male deer rub, the buck rub and its associated chemicals indicate the sex of the deer producing the rub.

第二，因为只有雄鹿会做出摩擦动作，摩擦动作和与之相关的化学物质表明了制造擦痕的鹿的性别。

youdao

The second line of research often used to justify single-sex education falls squarely within my area of expertise: brain and cognitive development.

经常被用来为单性别教育辩护的第二条研究路线恰恰在我的专业领域之内：大脑和认知发展。

youdao

She's played by Scarlett Johansson. "I've never really seen a film of this genre where the sex appeal of the female characters came second."

VOA: standard.2010.05.19

Which means that for the foreseeable future, at least when it comes to income, women will remain the second sex.

WSJ: Kay Hymowitz: Why Women Make Less Than Men

Knopf is set to publish the revised Second Sex in April.

FORBES: Satmars, Simone de Beauvoir And semicolons

If the court rules in their favor, New York could move closer to being the second state to allow same-sex marriages.

NPR: New York Court Hears Gay Marriage Arguments