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》

The more basic problem with Flannery's thesis is that there is no direct evidence that they killed any Australian megafauna.

弗兰纳里论文中更基本的问题是，没有直接证据表明它们杀死了任何澳大利亚的巨型动物。

youdao

There is as yet no direct evidence that chemicals formed in this way have proved harmful.

没有直接的证据证明以这种方式形成的化学物质有害。

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

He found no direct evidence that any board member had been the source of the leak.

NEWYORKER: The Kona Files

And there is no direct evidence that Fosamax prevents hip or wrist fractures in this broader group.

FORBES: On The Cover/Top Stories

Though it was possible they hunted in packs, there was no direct evidence for this, he added.

BBC: NEWS | Science/Nature | Dino may have been pack hunter