The phrase "a main theme in" is correct and usable in written English.
It can be used when discussing the central idea or topic of a piece of literature, art, or any other form of expression.
Example: "The novel explores a main theme in the struggle for identity and self-acceptance."
Alternatives: "a central theme in" or "a key theme in".
These structured instruments — why shouldn't we be able to rely on these ratings, as investors?" A main theme in Kroll's new projects, or potential projects, is trust — perhaps the scarcest commodity in today's financial markets.
The interchange touched on a main theme in classical music today: How can the traditional art form prosper in a hyperactive age of smartphones, computer tablets and 10-second attention spans?
A main theme in them was the relationship between Nazism and human understanding.
This highlights a main theme in Strawson--namely, that our responsibility practices are inherently social.
Hall says that a main theme in his videos is "visualizing the invisible".
A main theme in the episode is the horror of child birth.
We identified two main themes in the data: (1) no freedom in dress and (2) weight loss is the only solution to express feminine gender.
Piety towards nature was also a main theme of William Wordsworth, whose poetry was in vogue in America in the 1820s.
A main theme found in Belenggu, reflected in the title, is if one is "shackled" to the past, then one cannot flourish; Taum notes that this is reflected in Hartono's dialogue to Tini, as follows: "Mengapa tidak?
Connecting the identified themes and merging of appropriate sub-themes to form a main theme was done in the third stage.
For all the piece's extroverted gestures -- a funky main theme in the first movement, a bit of jazz in the second, an Appalachian flavor in the third -- the soloists' conversation seemed crabbed rather than expansive, and their interaction with the orchestra poorly knit.
