seventeen 四级六级

At the tender age of seventeen I left home.

在十七的小小,就离开了家。

In an unprecedented action, the army, on its own initiative, arrested seventeen civilians.

军队竟然擅自逮捕了17 个平民，这种行为简直是前所未有。

What's seventeen plus nine?

17加9等于多少?

I got it on seventeen days approval,so if you don’t like it we can change it.

买这件东西可试用17天,所以你要是不喜欢们可以拿去调换。

He’s only seventeen, but he has an old head on young shoulders and remains calm under pressure.

他只有十七，不过却少老成，面对压力沉着冷静。