For example, compared to Western countries, women in developing countries start having children at an earlier age.

VOA: special.2010.08.11

He claimed that children at this age literally can't understand that others can see the world differently from them.

他认为这个年龄的儿童完全没有意识到,别人眼中的世界,可以与自己看到的世界有所不同

耶鲁公开课 - 心理学导论课程节选

About half of stay-at-home moms have children under the age of five.

VOA: special.2010.04.23

Jemison says the survey also finds children are interested in science at an early age.

VOA: standard.2010.03.26