The telecommunications company announced the ceasing operation of waves.

The telecommunications company temporarily ceased operation of waves for maintenance.

The speed of this progressive wave is close to the speed of light.

He was always envious of others' success, saying that the grass is always greener on the other side.

He is undergoing training for extravehicular activity.

He engaged in an extravehicular activity from the spaceship.

We crossed the sea by catamaran.

The shipworm is known for eating wood.

This filter helps to improve the sound quality.

This coastline is protected by wave-dissipating blocks.