nicety

1. N-COUNT The niceties of a situation are its details, especially with regard to good manners or the appropriate behaviour for that situation. (禮儀或禮貌擧止上的)細節(jié)[usu pl, oft 'the' N 'of' n, adj N]

...the niceties of dinner party conversation. ...晚宴上談話的禮節(jié)。

He wasted no time with social niceties. 他沒有在社交禮儀上浪費一點點時間。