So it looked like you were doing some 70s disco dance.

所以看起来你 70 代的迪斯科舞。

A ball is usually a party where everyone wears very nice clothes and does some sort of formal dancing – not like disco dancing or the kind of dancing you would see in dance clubs, but more formal dances.

舞会通一个派对，每个人都穿着亮的衣服，某种正式的舞蹈——不像迪斯科舞或你会舞蹈俱乐部看到的那种舞蹈，而更正式的舞蹈。