Your trip must have been fun!

你这次旅行一定很开心吧！

《牛津词典》

The street must have been on a slope.

那条街一定是一直在一个斜坡上。

《柯林斯英汉双解大词典》

I must have been a horrid little girl.

我以前一定是个招人讨厌的小女孩。

《柯林斯英汉双解大词典》

But what I do remember was, at the end of that long, continuous coverage it must have been about two a.m.

VOA: special.2009.08.16

So, you must imagine these are successive kings who are being buried in this, what must have been, sacred soil.

因此,你必须设想他们是被埋葬在,这块圣土中的历任国王

耶鲁公开课 - 古希腊历史简介课程节选

I'm sure there must have been individual exceptions to everything, but we're talking about the overwhelming reality.

我相信任何事物都会有例外情况,但是我们所讨论的是无可辩驳的事实

耶鲁公开课 - 古希腊历史简介课程节选

Sunday must have been one of the biggest days for charity fundraising the UK has seen.

BBC: Believe.in and the business of charity

Back in the 17th Century, the piazza must have been an ideal spot for people watching, too.

BBC: An ancient Ottoman capital surfaces

That was news to me as it must have been to Mrs Miller and her family.

BBC: New "Welsh" name tipped for Secretary of State's job