The authorities often know that sex offenders will attack again when they are released.

当局通常知道性犯罪者被释放后还会再犯。

《柯林斯英汉双解大词典》

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

says illegal sex businesses often limit their customers to avoid being caught.

VOA: special.2010.06.14

And this is why the humor-- why the damage is often a certain sort of damage involving things like embarrassment, sex, scatology, a banana peel, pie in the face, your pants fall down or something, where there's no real harm.

这就是为什么幽默-,所涉及的伤害通常都是,涉及尴尬，性，不雅语言，香蕉皮，摔到脸上的派，掉裤子之类的，这些情况没有造成真正伤害。

耶鲁公开课 - 心理学导论课程节选

Too often, sex offenders are portrayed sympathetically while the victims are forgotten, she said.

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Today, turtles often begin the sex act in open waters, sinking during copulation.

MSN: Fossilized turtles' sex act frozen in time - Technology & science - Science - LiveScience | NBC News

For girls with ambiguous genitalia, the sex organs often work normally despite the ambiguous outward appearance.

CNN: Ambiguous genitalia