前因

shì qing fā shēng le jiù huì yǒu qián yīn hòu guǒ

事情发生了，就会有前因后果。

Every thing that happens has a cause and effect.

méi rén zhī dào nà liǎng gè gōng sī jìng zhēng de qián yīn hòu guǒ

没人知道那两个公司竞争的前因后果。

No one knew the antecedents and consequences of the competition between the two companies.