the best and most notable aspect of something
（事物的）最好方面；最显著方面
the scene is the crowning glory of this marvellously entertaining show.
该场面是这部精彩娱乐片的精华。
as the final event in a series of particularly fortunate or unfortunate events
（作为一系列极其幸运或不幸的事件的结尾）更让人高兴的是；更糟糕的是
it was cold and raining, and, to crown it all, we had to walk home.
天很冷，又在下着雨，更糟糕的是，我们得步行回家。