No. 10,070 in Russian
аэропортов
"Airports" (genitive plural form of аэропорт).
In a sentence
В этом регионе находятся четыре крупных аэропортов.
In this region, there are four major airports.
Here the word 'аэропортов' is in the genitive plural form, indicating ownership or relation when counting non-specific instances of 'аэропорт' (airport).
Я наблюдал за расписанием вылетов нескольких аэропортов.
I observed the flight schedules of several airports.
The word 'аэропортов' is in the genitive case to show possession or association ('schedules of airports').
Обслуживание всех аэропортов страны должно быть улучшено.
The service of all airports in the country should be improved.
Similarly, 'аэропортов' here indicates a plural genitive for showing relation ('service of airports').
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