Given the task definition and input, reply with output. Given a sentence in Igbo language, translate the sentence to English language keeping the meaning of the original sentence intact

Igbo sentence: "Ma o buru na Christ na a kpoliteghi, mgbe ahu nkwusa anyi bu n'efu okwukwe-unu bu ihe efu.
"And if Christ has not been raised, then our preaching is in vain and your faith is in vain.