The phrase "mainstream topics" is correct and commonly used in written English.
It refers to popular or widely accepted subjects or issues that are commonly discussed or in the mainstream media. Example: The conference will cover a variety of mainstream topics such as technology, business, and social media.
These are mainstream topics, but they are not without danger: between last summer's mass protests and the ongoing corruption scandal, the terrain of Turkish journalism has become quicksand.
But the defense lawyer, Lawrence Walters, is arguing that the evidence is sufficient to demonstrate that interest in the sexual subjects exceeds that of more mainstream topics — and that by extension, the sexual material distributed by his client is not outside the norm.
At the open meeting, more mainstream topics are selected, and therefore we may expect these papers to have a larger bearing in immediate clinical practice.
For example, Hacker News thrives even though the vote-based news website does not cover mainstream topics like Digg or Reddit do.
Increased specialization of scientific research, pressure to pursue mainstream topics, and the difficulty of obtaining grant money for the most audacious projects encourage scientists to focus on the incremental.
As one of the mainstream topics in the research field of infrastructure application of FRP composites, the near-surface mounted (NSM) fiber-reinforced polymer (FRP) strengthening technique has attracted an increasing attention over the last decade and become an effective alternative to the externally bonded FRP strengthening method.
Design, it seems, is becoming a mainstream topic.
Religion is not a mainstream topic in development.
"It's become so important to society that it has become a mainstream topic.
If this is a reaction to increased interest in the environment, the sticking point is that the environment is now a mainstream topic.
Furthermore, these results suggest that indeed environmental considerations have not yet become a mainstream topic within product development practices; for instance, there remains much potential for more frequent inclusion of environmental considerations within various product development phases, and for highlighting their role as criteria in decision-making.
