Alkynes play an important role in organic chemistry.

She was overjoyed to hear of his success.

He rejoiced when he heard the news of his promotion.

He is storing gold as a savings.

In this material, it is difficult for electrons to cross the valence band.

That topic is considered a taboo among them.

I like fishing in the coastal waters.

He is ready to work anywhere, far and near.

Myxomycetes are a branch of biology, and their ecology and biological characteristics are being studied.

I want to go to a Kinki concert.