To the best of my belief, those efforts entirely failed.

据我所知，这些努力完全失败了。

He went down, and to the best of my belief was never seen in Oxford again.

他倒下了，据我所知，他再也没有出现在牛津。

To the best of my belief, our case was in the last aspect a rather common one.

据我所知，我们的案例在最后一个方面是一个相当普遍的案例。

He looked a bum and to the best of my belief I had never seen him before.

他看起来像个流浪汉，据我所知，我以前从未见过他。

'Yesterday I came home, ' continued Knight, 'without having, to the best of my belief, imbibed half-a-dozen ideas worth retaining'.

“昨天我回到家，”奈特继续说道，“据我所知，我并没有吸收六个值得保留的想法”。

I felt a queer tingling in the nerves of my arm, a little jerk, and my hand and forearm lifted of themselves, I to the best of my belief neither aiding nor resisting, until they were several inches from the table.

我感到手臂的神经有一种奇怪的刺痛感，有点抽搐，我的手和前臂自己抬起来，据我所知，我既没有帮助也没有抵抗，直到它们离桌子几英寸。