No. 3,687 in Russian
третью
"Третью" means "third" (feminine instrumental case) in English.
In a sentence
Я читаю уже третью книгу на этой неделе.
I am already reading the third book this week.
The word 'третью' here is used in the accusative case (feminine singular) to indicate an ordinal numeral describing the noun 'книгу' (book) as the third item.
После долгих раздумий я выбрал третью дорогу.
After long contemplation, I chose the third path.
In this sentence, 'третью' is in the accusative case (feminine singular) and refers to 'дорогу' (path) as the third option being chosen.
Учитель проверяет третью работу из стопки.
The teacher is reviewing the third paper from the stack.
Here, 'третью' is used in the accusative case (feminine singular) to describe 'работу' (work or paper) as the third item being reviewed.
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