расследования

расследования

Investigations.

Here, 'расследование' is used in the singular form to signify the activity or process of investigating a specific incident, emphasizing its formal and official nature.

Полиция начала расследование преступления.

The police began the investigation of the crime.

In this sentence, 'расследованиях' is used in the plural form and instrumental case to describe multiple investigative activities conducted by a journalist, stressing repeated or varied nature of these activities.

Её книга рассказывает о расследованиях журналиста.

Her book tells about the investigations of a journalist.

Here, 'расследования' in plural form nominative case is used to indicate the results of multiple investigative actions regarding an incident, highlighting their outcome.

Расследования показали, что причина аварии крылась в технической неисправности.

The investigations revealed that the cause of the accident lay in a technical malfunction.