Alkynes play a very important role in organic chemistry.

Alkenes, also known as olefin hydrocarbons, play an important role in organic chemistry.

Alkenes play a very important role in organic chemistry.

His army had a great array of spears and chariots like '輵'.

He planed the wood and made a model airplane.

He picked up the whip and started practicing.

This gem has a beautiful cinnabar color.

We joined the school's cheerleading squad.

My boat is equipped with the latest fishfinder.

Herpes simplex virus is a virus that mainly infects the lips and genitals.