You can't tell her that joke—she's much too prim and proper.

你可别跟她讲那个笑话，她这个人古板正经得要命。

《牛津词典》

We tend to imagine that the Victorians were very prim and proper.

我们往往认为维多利亚时代的人非常古板、循规蹈矩。

《柯林斯英汉双解大词典》

May is always prim and proper.

梅总是很端正且很体面。

youdao

Girls who had stayed prim and proper awaiting some future Prince Charming now had no hope at all.

FORBES: The Social Deterioration of Funny, Floating Money