Children often throw tantrums at this age.

儿童在这个年龄经常犯脾气。

《牛津词典》

Sophia could play the piece when she was this age.

索菲娅在这个年龄时就能弹奏这首曲子了。

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In this age of the keyboard, some people seem to think handwriting lessons are on the way out.

VOA: special.2009.10.29

So the mathematical notions of infinity or logical notions like logical entailment are beyond a child of this age.

因此,对于无限这个数学概念,或者是,像逻辑蕴涵这样的逻辑概念,超出了该年龄阶段儿童的理解范围

耶鲁公开课 - 心理学导论课程节选

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

It is the leading cause of blindness in this country, in this age group by far.

CNN: Smoking quadruples risk for vision-stealing eye disease

And yet she thinks more will come in this age of declining record sales.

WSJ: Pop songwriters find excitement in stage musicals

Others also have been well ahead of Rose at this age, according to Baseball-Reference.com.

WSJ: Miguel Cabrera: The (Eventual) Threat to Pete Rose