【摩登家庭】“拿出最好的表现”英语怎么说？

【句子】Therefore, I need you guys to be on your best behavior. 【Modern Family-S2E15】
【发音】[ˈðeə(r).fɔ:(r)] [aɪ] [ni:d] [ju:] [gaɪz] [tʊ] [bi:] [ɒn]/[ɑ:n] [jɔ:(r)] [best] [bɪ'heɪvjə]
【发音技巧】need you音的同化；best behavior完全失去爆破；
【翻译】所以我需要你们大家都拿出最好的表现来！
【适用场合】
be on one’s good/best behavior
拿出某个人的良好的/最好的表现来；
美式英语更常见；
to behave extremely well and be very polite on a particular occasion
eg: You kids must be on your best behavior for your Auntie this weekend!
这周末姑妈要来，你们这帮孩子一定要拿出最好的表现来哦！

eg: When we went out, the children were on their best behavior.
当我们外出的时候，孩子们表现特别好。

eg: Mother told the children to be on their best behavior during Grandma's visit.
妈妈告诉孩子们，在奶奶到家里做客期间一定要乖乖听话。

eg: I'd just met his parents for the first time so I was on my best behavior.
我第一次见他爸妈，所以我表现得很好。

【尝试翻译以下句子，并留言在文章留言区】
The whole staff were on their best behavior while the client inspected the premises.