There's not a scintilla of evidence.是什么意思？

There's not a scintilla of evidence.

毫无证据.

not

adv. 不，[用以表示否定、否认、拒绝、禁止等]不是，几乎不，未必，没有[用于否定后面的词或短语]；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

scintilla

n. <正>极少，微量；

例句
There's not a scintilla of evidence.
毫无证据.

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

evidence

n. 证词，证据，迹象，明显；vt. 使明显，显示，表明，证实；

例句
...scientific evidence that did not fully accord with the facts uncovered by the police.
与警方所掌握的情况不完全一致的科学证据