“确凿地”怎么读？

警方确凿地认定他有罪.The police established his guilt beyond all doubt.这就确凿地证实了振荡的本质是次光球层的低频声波本征模式.This firmly establishes the nature of the oscillations as low acoustic eigenmodes of the subphotospheric layers....

“确凿地”的英语可以翻译为：provenly...