He says there is "not a scintilla of evidence" to link him to any controversy.

他说“没有丝毫证据”能将他与任何争议联系起来。

《柯林斯英汉双解大词典》

There is not a scintilla of evidence in this case.

在这个个案里，连一丁点证据也没有。

youdao

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

And he added that an inquiry had shown "there is not a single scintilla of evidence of any impropriety whatsoever" by current cabinet ministers.

BBC: 'Anger and incredulity' over MPs' lobby claims