His success was beyond belief since his competitor was so experienced.

他的成功令人难以置信，因为他的对手非常有经验。

youdao

In the times of the emperors, the formality within the Forbidden City was rigid beyond belief.

在帝王时代， 紫禁城内的礼仪异常严格， 令人难以置信。

《新英汉大辞典》

The feats accomplished by the strongest men and women are almost beyond belief.

最强壮的男人和女人所成就的壮举几乎让人无法相信。

youdao

On and on they marched. Many of them -- weak from hunger and tired beyond belief could go no farther.

VOA: special.2009.12.17

"To think that he's capable of something like this is beyond belief, " Mercado said.

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In online forums, comments include: "My respect for the BBC has plummeted beyond belief!"

BBC: NEWS | UK | Education | Anger over Joseph choir contest

"Why the State Department didn't revoke his visa immediately is beyond belief, in my judgment, " he said.

CNN: STORY HIGHLIGHTS