No. 4,937 in Russian
компаниями
"Компаниями" means "by companies" (instrumental plural of "компания").
In a sentence
Мы сотрудничаем с различными компаниями.
We collaborate with various companies.
In this sentence, 'компаниями' is the instrumental plural form of 'компания', meaning 'companies'. It is used to indicate the entities with which the subject collaborates.
Тренинг был организован международными компаниями.
The training was organized by international companies.
Here, 'компаниями' is again the instrumental plural of 'компания'. It specifies the entities that performed the action of organizing the training.
Она работает с иностранными компаниями в области технологий.
She works with foreign companies in the field of technology.
Once more, 'компаниями' appears in the instrumental plural form, used to describe the entities she collaborates with in her work.
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