Dentists say children should have their first dental visit at least by the time they are one year old.

VOA: special.2009.03.11

Any of you who have access to a four- or five-year-old, a sibling or something-- Do not take one without permission, but if you have access to a four- or five-year-old you can do this yourself.

如果你身边有四五岁大的孩子,兄弟姐妹什么的,一定要先得到同意再去试验,如果你身边有四五岁大的孩子,你可以自己去试试

耶鲁公开课 - 心理学导论课程节选

You put a child on one side of the mountains and you ask him to draw it, and a four- or five-year-old can do it easily, but then you ask him to draw it as it would appear from the other side and children find this extraordinarily difficult.

你让孩子在模型的一边,要求他把自己看到的三山模型画出来,四五岁的儿童便能够轻易做到,但是,如果你要求儿童画出,从模型另一边看过去的样子,儿童就会觉得非常困难

耶鲁公开课 - 心理学导论课程节选

The seventy-one year old cried tears of joy as she told the crowd the award was "a long time coming" but worth the wait.

VOA: special.2011.02.18

By next April,he says, all H.I.V.-infected children less than one year old will receive treatment.

VOA: special.2009.12.02

Among those taking part was twenty-one year old political activist Quiteria Guirengane.

VOA: special.2011.06.24

Joe is a twenty-one year old student at the University of Virginia.

VOA: special.2009.12.28

Helen was their first child. Until she was a year-and-one-half old, Helen Keller was just like any other child.

VOA: special.2009.11.08

The twenty-one year-old throws a sharp breaking ball that cuts across the plate at the last second.

VOA: special.2010.06.18

One of Carlene Stephens' favorite artifacts is a four hundred fifty-year old carved figure from Germany.

VOA: special.2011.06.21

One of them is Louise Bourgeois, a ninety-seven year old artist in New York City.

VOA: special.2009.03.13

Hours later, Tariq Jahan, the father of twenty-one-year-old victim Haroon Jahan,appealed for calm.

VOA: special.2011.08.13

One of the winners is nineteen year old Nicholas Godfrey from Rome,Georgia.

VOA: special.2010.04.05

One child who works with it is six-year-old Kevin Fitzgerald.

VOA: special.2009.12.17

She was a twenty-one-year-old woman.

VOA: special.2010.06.27

A month earlier,twenty-six year old Zamperini had been one of the greatest runners in the world, expected by many to be the first to break the four-minute mile, one of the most celebrated barriers in sport.

VOA: special.2011.05.04

One of the returnees was Nilufer Cetin who was traveling with her one-year-old child on the Mavi Marmara.

VOA: standard.2010.06.01

Since the 49-year-old suffered catastrophic injuries after separate accidents, he has constantly asked for one thing: the right to die in peace.

VOA: standard.2009.08.14

The 79-year-old Specter was one of the most senior Republicans in the Senate and held influential positions on Judiciary and Appropriations committees.

VOA: standard.2009.04.28

Seventy-one-year-old Kay Mamonas is one of the seniors on the receiving end of all this holiday spirit.

VOA: standard.2009.12.24

They will replace the telescope's 15-year-old workhorse camera with one that sees deeper into the universe.

VOA: standard.2009.05.14

Nineteen-year-old Cimeau Cassandra is one of several students from Port-au-Prince whose schools are now closed and who have come to Mirebalais to register for classes.

VOA: standard.2010.02.01

Antonio Stefanus, a 21-year-old biology student at the University of Namibia, is one of them.

VOA: standard.2009.11.27

Off the Normandy coast,Earl W.Norwood was a 17-year-old sailor who operated a landing craft between the ships and Omaha Beach, one of the beaches where the Americans landed.

VOA: standard.2009.06.02

One of the men on death row is 31-year-old Robert Will, who,at the age of 22, took part in a crime that resulted in the murder of a police officer.

VOA: standard.2009.10.21

A woman named Liseth, who has just arrived at the house carrying her two-year-old daughter, is one of a group of three women who say they crossed Guatemala from their native Honduras.

VOA: standard.2009.09.01

In February,in what was seen as one of the most brutal attacks on Roma, police said Robert Csorba and his five-year-old son were shot dead when they tried to flee their home that was set on fire.

VOA: standard.2009.08.22

He was still breathing," In one of the cases this month, a 45-year-old Roma woman was killed in the eastern village of Kisleta and her 13-year-old daughter was seriously injured when police say gunmen broke into their home at night and shot the victims in their sleep.

VOA: standard.2009.08.22