He found no direct evidence to identify a leaker.

他找不到直接证据来确认泄密者。

《柯林斯英汉双解大词典》

It would be wonderful to observe a singularity and obtain direct evidence of the undoubtedly bizarre phenomena that occur near one.

如果能观察到一颗奇点，并获取关于奇点附近出现的可信的怪异现象的直接证据，那将非常好。

youdao

They may be ancient "beer-making tools", and the earliest direct evidence of beer brewing in China, the researchers reported in the Proceedings of the National Academy of Sciences.

研究人员在《国家科学院院刊》上报告称，它们可能是古代的“酿酒工具”，也是中国酿造啤酒最早的直接证据。

youdao

Experts said there was still no experimental evidence to prove that the drop in crime was a direct result of efforts to clean up city neighborhoods.

VOA: special.2009.03.03

"Now Mr.Taylor,you have said to this bench throughout your direct examination that all of this evidence here before you,it's all lies.

VOA: standard.2009.11.10

But there was little direct evidence to show that cutting saturated fats actually lowered the risk of heart disease.

VOA: standard.2010.03.25

And a typical line from the instruction that is given to federal courts -- federal juries all across the land: The law makes absolutely no distinction between the weight or value to be given either to direct or circumstantial evidence, nor is a greater degree of certainty required of circumstantial evidence than of direct evidence.

CNN

Although Grey Goose found no direct evidence to suggest direct involvement by the Russian government, "We did find evidence of links to some existing organized criminal elements in Russia, " says Ferguson.

FORBES: Magazine Article

But federal courts instruct juries that circumstantial evidence is just as probative as direct evidence.

CNN: Transcript: Judiciary Committee impeachment hearing