The children are enjoying playing in the mud at the park.

He rose in the world through hard work and talent.

He was arrested on suspicion of kidnapping a child.

The Mariana Trench is the deepest part of the earth.

Once upon a time, a frog was hopping around in a pond.

Despite their simple body structure, nematodes have surprisingly complex ecosystems.

Neurotransmitters play a crucial role in transmitting information in the brain.

He damaged his motor nerves in an accident.

He received a heavy penalty for that crime.

Kei gave a wonderful speech.