Autism occurs in all racial, ethnic and social groups and is four times more likely to strike boys than girls.

自闭症可以出现在所有人群，种族以及各种社会团体，并且男童的发病率是女童的四倍。

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S. children — many more boys than girls — has the disorder, according to the U. S. Centers for Disease Control and Prevention.

据美国疾病控制和预防中心估计，每110个美国儿童当中就会出现一个自闭症儿童，而男孩的数目要大大高于女孩。

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Low birth weight tended to be more often linked to autism spectrum disorders in boys than girls (9.9 percent versus 3.3 percent).

低体重新生儿与自闭症之类的疾病的联系程度，男孩比女孩更高(9.9%对3.3%)。

youdao

Researcher Christianne Corbett says more boys than girls score very high on math tests in most countries.

VOA: special.2010.04.01

Still,she says, far more boys than girls join sports teams nearly forty years after Title Nine gave girls a chance to level the playing field.

VOA: special.2010.03.04

It is more common among boys than girls.

VOA: special.2009.07.28

We have known for many years that autism is more common in boys than girls.

CNN: How girls and boys differ when it comes to autism

The subject attracted more boys than girls, but girls had higher attainment.

BBC: NEWS | UK | Education | Alarm at history 'Hitlerisation'

It also has far more boys than girls--a rather insidious problem.

FORBES: New Geographer