He emphasized the importance of class struggle.

It suddenly started raining.

This area was formed under the influence of a lava dome.

Tomorrow's flight has been cancelled as planned.

Tomorrow's flight has been cancelled as planned.

My laboratory is on the third floor of the university.

There is a proverb, 'a cornered rat will bite a cat,' which means that a person driven into a desperate situation will fight back even against an opponent they would normally fear.

There is an old incandescent light bulb in my room.

I hope our love will be eternal.

He is an expert in geophysics.