Question

پس از اینکه پایپروس های جادویی در بیابان مصر یافته شدند، رمزگشایی آنها نیازمند سالها کار کارشناسان بود.

Answer 1

After that magic papyri/papyruses were found in the Egypt desert, deciphering/decoding/decrypting them needed years of experts' work.

Answer 2

When the mystereious papyruses had been found in Egypt desert, decoding needed years of expert work.