Do you think the prosecution made any particular errors, or did they just have a weak case?

你认为控方是真的出了纰漏，还是只是证据不足？

《柯林斯英汉双解大词典》

As he had a weak case and could not defend himself, he had to resort to sophistry.

他理屈词穷，只好求助于诡辩。

《新英汉大辞典》

youdao

He is an old,weak man and his case is severe.

VOA: special.2009.08.01

It's not the case that for Hannibal, choosing the easy pass to attack through, strictly dominates choosing the hard pass, but it is the case that there's a weak notion of domination here.

对汉尼拔而言,选择平坦之途入侵并不是,严格优于选择崎岖之途的,但是在这种情况下有一个弱优势

耶鲁公开课 - 博弈论课程节选

Judge Wright may view them as lawyerly confections designed to bolster a weak case.

CNN: Now It's Her Turn

Mary Higgins QC, for Daly, also contended that her client was facing "a weak case based on a scintilla of evidence".

BBC: Omagh bomb scene

The companies, in survival mode and out of pure self-interest, jump at the chance, as even a weak government case can destroy them.

FORBES: Justice 'Deferred'