在婚礼上，新郎戴着一顶黑色高礼帽显得格外优雅。

The groom looked particularly elegant wearing a black ___top-hat at the wedding.

这场慈善晚宴要求top-hat着装，彰显宾客的社会地位。

The charity dinner requires ___top hat attire to reflect the guests' social status.