She's always holding up her children as models of good behaviour.

她总是举例说自己的孩子表现如何好。

《牛津词典》

The magistrate bound him over to be of good behaviour.

治安法官使他具结保证表现好。

youdao

Mary was always holding up her children as paragons of good behaviour.

玛丽老是标榜自己的孩子是品行端正的典范。

youdao

Sentence on Kane was deferred until 23 August for her to be of good behaviour.

BBC: Hawick town hall

As my recent letter shows, I do appeals to supporters' sense of good behaviour.

BBC: SPORT | Football | My Club | Celtic | Celtic make new appeal on chants

But if earlier generations were paragons of good behaviour, why do so many old children's books praise naughtiness?

ECONOMIST: Naughty children