There is no conclusive proof.

没有确凿的证据。

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Yet banking regulators wait for conclusive proof of danger ahead before they act.

然而，银行监管机构在行动之前等候对抗危险的确凿证据。

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Iran claims to have put a satellite in orbit recently, but there is no conclusive proof.

伊朗宣称最近已经把一颗人造卫星放入轨道，但是没有确凿的证明。

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It does not offer conclusive proof that this is causing a rise in asthma.

BBC: NEWS | Health | Cleaning products 'wheezing link'

After all, there is little conclusive proof that Bigfoot is anything but a myth.

BBC: On the trail with Bigfoot-hunters

But there has never been conclusive proof there are big cats roaming wild in the countryside.

BBC: 'Big cat' probe after sheep death in Pembrokeshire