average age years old

The average age of the fleet of the seven large U.S. passenger airlines is about 14 years old according to the airline monitor.

据航空公司监测显示，美国7家大型客运航空公司机队的平均机龄约为14岁。

In a report by online shopping platform Tmall, more than 2 million hanfu outfits were sold in 2018. The average age of buyers was 21, with about 52 percent between 19 and 24 years old.

线上购物平台天猫的一份报告显示，2018年汉服的销量超过200万。买家的平均年龄为21岁，其中约52%的人年龄在19至24岁之间。

The survey found the average age for the onset of puberty of Guangzhou's children dropped to 11 years old from the previous age of 13.

调查发现，广州儿童进入青春期的平均年龄从之前的13岁下降到了11岁。