We were left with an open bottle of champagne three-quarters full.

有人留给我们一瓶打开过的、还剩3/4的香槟酒。

《柯林斯英汉双解大词典》

DO NOT uncork the champagne but it may be worth cracking open a beer.

开香槟庆祝也许为时尚早，不过开瓶啤酒痛饮一番还是值得的。

youdao

Why don't we （crack）open a bottle of champagne to celebrate?

我们何不开瓶香槟酒庆祝一下呢？

youdao

It is more likely that they popped open champagne bottles and celebrated, for now they had achieved government control over the gigantic home mortgage business.

FORBES: The Unstoppable March Toward National Bankruptcy: Who's To Blame?

Eagle Computer goes public, and its founder cracks open the champagne, gets pleasantly drunk and takes his Ferrari out for a romp.

FORBES: Magazine Article

That said, this is not the moment to crack open the champagne.

BBC: How pretty is the UK without the "bad bits"?