He is a Go player with a dan rank.

This fabric is perforated, so it has good breathability.

This timber is perforated, allowing the wind to pass through.

His success is connected to his efforts.

I am in constant contact with her.

I bought a new headphone.

I bought a new headphone.

Hercules is a hero of Greek mythology.

We report the progress of the project based on the principle of reporting, contacting, and consulting.

In this forest, various organisms live by building a relationship of mutualism.