be of the belief that

hold the opinion that; think

相信，认为

beyond belief

astonishingly great, good or bad; incredible

（…得）令人难以置信的

richness beyond belief.

难以置信的丰富（或富饶）。

the driving we have witnessed was beyond belief.

我们亲眼目睹的驾车场面令人难以置信。

in the belief that

thinking or believing that

认为，相信

he took the property in the belief that he had consent.

他拿了那份财产，以为自己得到了同意。

to the best of my belief

in my genuine opinion; as far as I know

我的确认为；据我所知