This is the 2237th most frequent Russian word.
дронами
The word "дронами" is the instrumental plural form of "дроны," which means "drones" in English.
In this sentence, 'дронами' refers to unmanned aerial vehicles, used here as the object of observation.
Мы наблюдали за дронами, которые летали над лесом.
We observed the drones flying over the forest.
Here, 'дронами' indicates the tools used in the experiment, emphasizing their role.
Эксперимент с дронами показал успешные результаты.
The experiment with drones showed successful results.
In this example, 'дронами' refers to the devices being controlled by the scientists for research purposes.