I must be the happiest person on earth !

我一定是世界上最幸福的人！

《牛津词典》

I reckon I must be the owner of the biggest slipper in the world.

我觉得这是世界上最大的拖鞋。

youdao

I must be the only one dumb enough to think it might have been that way.

我一定是唯一一个傻到认为它是那么组词的。

youdao

She wrote "I Must Be Saved" to honor the folk singer Odetta whom Peyroux calls her spiritual grandmother.

VOA: special.2009.07.10

I must be the unhappiest person in the world.

我肯定是这世上最不幸的人了。

Must 实战 - SpeakingMax英语口语达人

If there is atmosphere in the passage I'm about to quote from Macbeth, it must be atmosphere of a certain kind and there for a certain reason.

如果下面这篇《麦克白》里的选段有所谓的“气氛“,那这种气氛一定因为某种原因以某种形式存在着。

耶鲁公开课 - 文学理论导论课程节选

Now that the Spanish PREDIMED study has been published, I think it must be considered the gold standard.

FORBES: The Mediterranean Diet: The New Gold Standard?

"I recognise the concerns that must be felt by Ansett's employees and I am hopeful that the administrators will be able to start negotiations with another bidder as a matter of urgency, " Mr Anderson said.

BBC: Talks to save Australian airline collapse

Secondly, as I stated, the sobriety test must be put there for the vice squad.

NPR: Sharpton Urges Action After Fatal NYPD Shooting