The main thrust of the argument was that education is the key to success.

We are having fish for our main course.

I mainly eat vegetables for dinner.

It is important to maintain a healthy lifestyle.

Regular maintenance is essential to keep your car running smoothly.

The island is located close to the mainland.

The new movie is expected to appeal to a mainstream audience.

The mainframe is responsible for processing large amounts of data.

The mainline train is running late.

The sailor climbed up the mainmast to adjust the sails.