经过调查，我们推翻了原来的结论。

Jīngguò diàochá, wǒmen tuīfān le yuánlái de jiélùn.

After investigation, we overturned the original conclusion.

这个假设后来被新的实验数据推翻了。

Zhège jiǎshè hòulái bèi xīn de shíyàn shùjù tuīfān le.

This hypothesis was later overturned by new experimental data.

任何决定都不是不能推翻的，只要有充分的理由。

Rènhé juédìng dōu bú shì bùnéng tuīfān de, zhǐyào yǒu chōngfèn de lǐyóu.

No decision is impossible to overturn, as long as there are sufficient reasons.