这将是我们参加过的最盛大的感恩节晚餐。It's going to be the most magnificent Thanksgiving dinner we ever had.全家人都来参加了这次盛大的家庭聚会。The whole family was there for this big family reunion.我们下周组织一次盛大的晚会吧。Let's plan a big night next week....

“盛大的”的英语可以翻译为：grand，royal ...