Their ages are sixteen and seventeen.

他们都是十六七岁。

youdao

Seventeen Methods" plays an important role in the field of processing medicinal herbs, and also makes a notable impact on modern ages. However, some problems among it are still existed."

“十七法”在炮制领域占有重要位置，对后世的炮制方法产生过一定影响，亦存在不少疑点。

youdao

Forty-four point four percent of all children between the ages of ten and seventeen years were obese or overweight.

VOA: special.2009.07.21

Abby Halloran,a manager at a Gamestop store in Clinton,Maryland,says these are meant for ages seventeen and older.

VOA: special.2011.07.04

Between the ages of seven and seventeen, Steltzner broke thirty-two bones and got a hundred and seventy-two stitches.

NEWYORKER: The Martian Chroniclers

And so they developed the apprenticeship system, in which young people from approximately the ages of twelve to seventeen would enter work in a shop, signing a contract that would commit them for the term of seven years.

FORBES: Why Apprenticeships Are the Fastest Way to Acquire Skills