Definition: the subject of a talk, book, movie, etc. Level: B2
他大部分小说都贯穿着失去这个主题。
The ___theme of loss runs through most of his novels.
我认为这本书的基本主题非常原创，作者写了很多伟大的小说。
I think that the basic ___theme of the book is very original and the author has written lots of great novels.
电影的主要主题是爱与牺牲。
The main ___theme of the movie is love and sacrifice.
