前文

zhèng rú qián wén suǒ shù

正如前文所述

as has been mentioned above

qián wén suǒ tí jí de zhè xiē zhèng cè bìng bù zǒng shì chéng gōng de

前文所提及的这些政策并不总是成功的。

These policies, as noted above, are not always successful.