This is the 176th most frequent Russian word.
две
"Две" means "two" (feminine form) in English.
Here, 'две' is used as a numeral to denote the quantity 'two' modifying the feminine noun 'книги' in the nominative plural case.
У меня есть две книги.
I have two books.
In this sentence, 'две' modifies the feminine plural noun 'машины' in the accusative case, as it is the direct object of the sentence.
Ты видишь эти две машины?
Do you see these two cars?
Here, 'две' quantifies the feminine plural noun 'лампы' in the accusative case indicating the items to purchase.