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

所以看起来你在跳 70 年代的迪斯科。

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.

常一，每人都穿着非常漂亮的衣服，跳某种正式的蹈——不像迪斯科或你在蹈俱乐部看到的那种蹈，而更正式的蹈。