Sentence examples for an old idea from inspiring English sources

This is an old idea.

It's an old idea.

"It's like an old idea.

Two new shows on an old idea.

This is, of course, an old idea.

A new study confirms an old idea.

Nuclear propulsion is an old idea.

But it's an old idea, too.

But I wanted to focus here that's an old idea.

Sometimes there's nothing like an old idea revamped.

Here's an old idea whose time has come again.