This is the 3435th most frequent Turkish word.
mahallelerde
"In the neighborhoods."
'Mahallelerde' refers to 'in the neighborhoods', specifying locations where an activity is taking place.
Mahallelerde çocuklar sokakta oynuyor.
In the neighborhoods, children are playing on the streets.
'Mahallelerdeki' derived from 'Mahallelerde' indicates possessive context, referring to 'the ones in the neighborhoods'.
Mahallelerdeki marketler erken kapanıyor.
The markets in the neighborhoods close early.
'Mahallelerde' again means 'in the neighborhoods', but paired with 'bazı' (some) specifies a subset of neighborhoods.