Minimum reading
“Pairs” can be taken as two kinds of every fruit.
“In them there are pairs (or two kinds) of every fruit”.
“Pairs” can be taken as two kinds of every fruit.
The dual can be used to signify many—i.e., numerous varieties of each fruit.
Zawjaan can mean two kinds, or — the dual may be used to indicate many, pointing to numerous varieties.
This centers the interpretive range on how the dual is understood in the phrase.