The secret was this: The real stone would feel warm, while ordinary pebbles are cold.

秘密是这样的：真正的石头是温暖的，而普通的石头是冷的。

youdao

Being a real friend doesn't mean keeping a secret that may hurt someone.

做一个真正的朋友并不意味着要保守可能会伤害别人的秘密。

youdao

The real secret is no secret.

真正的秘密不是秘密。

youdao

Lipman says it is no secret that many Russians do not consider the Caucasus to be a part of the "real" Russia and prefer not to think about events there.

VOA: standard.2010.04.01

We kept it a real secret, we hardly told anyone until the day before.

BBC: February: Touched by an angel

She also supports Houston's limited restrictions on land use, which some here call its real secret sauce.

WSJ: The Weekend Interview with Annise Parker: The Modern American Boomtown

But the real secret seems to lie in being an entrepreneurial repeat offender.

FORBES: Fiji Water's David Gilmour Takes Aim At New Start Up