他习惯睡前喝一小杯威士忌作为安眠饮料。

He usually has a small whiskey as a ___nightcap before bed.

冬天睡觉时，奶奶总是戴着睡帽保暖。

Grandma always wears a ___nightcap to keep warm when sleeping in winter.

今晚的足球比赛将是这一系列赛事的压轴戏。

The football match tonight will be the perfect ___nightcap to this series of games.