It's a saying that always prove to be true.

它是条反复被证明是正确的言论。

youdao

One of the Cook legends will prove to be true and it will happen one day.

我坚信某一天库克传说之一将会被证明是真的。

youdao

If even portions of these claims prove to be true, they will force a major rewrite of the book of human evolution.

即使只有部分结果得到证实，它们也能迫使我们对人类进化史做出重大修改。

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If these allegations prove to be true, Nike could be the one hung out to dry.

FORBES: Will Nike Be Implicated In The Lance Armstrong Scandal?

That may yet prove to be true in high tech Seattle, which is quite the Comcast stronghold.

FORBES: Is Comcast Headquartered Near Lake Woebegon?

And if they prove to be true, does that cross any type of red line for the President?

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,