Learn Farsi: طی این هفته چند سامانه را از طریق درگاه ارزیابی کردید؟ - How many systems did you evaluate via the portal during this week?

طی (tayy-e) is a formal preposition meaning 'during' or 'over the course of.' You could use a simpler word like در (dar) for 'in this week,' but طی emphasizes the continuous duration or span of the week. Notice that it connects to the following word with an ezafe.

How does از طریق work to mean 'via' or 'by means of'?

از طریق (az tarigh-e) literally translates to 'from the way of' or 'from the path of.' It is a formal compound preposition used to express the medium or channel through which something is done. It always takes an ezafe to connect to the noun that follows, which in this case is درگاه (portal).

Why is سامانه (system) singular here even though the English translation says 'systems'?

In Farsi, question words that ask for a quantity, like چند (how many), are always followed by a singular noun. So چند سامانه literally means 'how many system,' but we naturally translate it as plural in English.

Why is the specific object marker را used after چند سامانه?

While 'how many systems' might seem indefinite, adding را (ra) implies a specific, limited set of systems that both speakers are aware of. It gives the nuance of 'how many OF THE systems did you evaluate?' rather than just systems in general.