The wedding was a very grand occasion.

婚礼场面非常隆重。

This is a grand occasion.

这是个盛大的场面。

It was a grand occasion.

这可是一次盛大的活动哦。

Let us come, cooperate grand occasion together!

让我们一起来共襄盛举吧！

A wedding is usually a grand occasion with so many formalities.

通常，婚礼是隆重场合，有很多的礼节。