What does an author mean with a certain phrase or word?

Have you noticed how certain phrases seem to take hold?

Or did she put a rather innocent construction on certain phrases?

Other notable statistics include the number of times certain phrases were mentioned.

He smiled, and quoted a certain phrase, recalling a personal matter between us.

There are always certain phrases which circulate for a while and then fade.

"I am confused about certain phrases the children use," she said as they walked towards the water fountain.

I was only in high school," she said, "so that I've forgotten every bit, but still sometimes certain phrases come back.

Admitting the affront, he made capital out of certain phrases.

It was curious how certain phrases just crept in there and could not be brushed off.