at the age of的意思和用法

问题描述:

at the age of的意思和用法

在....的年龄的时候

请采纳
例句:
She was barely walking at the age of four.她四岁时才勉强会走。
I began to write at the age of forty.我在四十岁起开始写作的。
Fleming died of heart failure at the age of 56.弗莱明死于心脏衰竭,享年56岁。
Bald eagles acquire their distinctive white head feathers when they mature at the age of two or three years with wingspans up to seven feet in length, wingtip to wingtip.秃头鹰收购其独特白色羽毛头时,他们成熟的年龄两三年内与翼展达七英尺长,翼尖至翼尖。
Daniel could swim at the age of six.丹尼尔六岁时就会游泳。

at the age of
在…岁时
He became a doctor at the age of 27.
他27岁时成了一名医生.
He was a middle school student at the age of 14.
他14岁时是个中学生.
例句都有,还不具体?