британский

британский

British

Here, 'британская' is an adjective modifying the noun 'книгу' (subject with feminine gender). It describes the origin of the book, signifying that it is from Britain or British in nature.

Я прочитал британскую книгу.

I read a British book.

In this sentence, 'британские' is an adjective agreeing with 'ученые' (subject with plural gender). It identifies the nationality of the scientists, indicating they are from Britain.

Британские ученые сделали важное открытие.

British scientists made an important discovery.

Here, 'британская' is used as an adjective describing the noun 'вечеринка' (subject with feminine gender). It conveys the theme or style of the party, associated with British culture or traditions.

У нас будет британская вечеринка.

We will have a British-themed party.