The claims were impossible to verify.

但这些说法无法得到证实。

youdao

So it may be impossible to verify its authenticity.

因此已不可能被确认其纯正性…

youdao

Foreign officials who watch Venezuela closely say that Cuban agents occupy key posts in Venezuela's military intelligence agency, but these claims are impossible to verify.

近距离观察委内瑞拉的外国官员表示古巴军官在委国军情局担任要职，但这些说法未能得到证实。

youdao

It is impossible to verify who precisely is driving the demand for Chinese consumer goods.

WSJ: Luxuries Flow Into North Korea

They are systems not suited to preemptive warfare and their deployments are impossible to verify effectively.

CENTERFORSECURITYPOLICY: Center for Security Policy | An Assessment Of Future Requirements For US Strategic Forces And Strategic Arms Control

Finally, it is impossible to verify a ban that extends to very low yields.

CENTERFORSECURITYPOLICY: Six Secretaries of Defense Urge Defeat of C.T.B.T.