The flaw in this theory lies in the lack of proof to support it.

这一理论的缺陷在于缺乏支持它的证据。

youdao

So Millikan's paper is not at all, as we would now expect, an experimental proof of the quantum theory of light.

所以，密立根的文章根本不像我们现在认为的那样，是对光的量子理论的实验验证。

youdao

Okay, so that's more of a theory than a rumor, but come on, the proof is right there.

好吧，这个更像是理论，而非谣传，但是你瞧证据不都明摆着嘛。

youdao

Britain, wellspring of the industrial revolution, is the chief proof of this theory.

ECONOMIST: Creating economic wealth

However, all the researchers involved are keen to stress that their finding falls a long way short of proof for this theory.

BBC: Clues to massive leukaemia rise

The charitable ways of Gates and Buffett also provide living proof that the "trickle-down theory" is in fact reality.

FORBES: Magazine Article