The ejecta from volcanoes help to elucidate the geological history of the Earth.

He was skilled in using an ancient weapon, a chain with a weight on one or both ends.

He is working on his job with all his might.

He always follows me around, just like a goldfish's poop.

The health of the reproductive organs greatly affects overall health.

My new rice cooker is very convenient.

My hobby is playing musical instruments.

The shock absorbers of this car have been replaced with new ones.

Fish use their respiratory organs to take in oxygen underwater.

He truly embodies the saying, 'A gentleman is no specialist.'