He studied deeply about communism.

We have to cooperate to make the project successful.

Immediate assistance is needed because the war situation is deteriorating.

The doctor told him that there was fluid accumulating in his thoracic cavity.

After listening to his story, I deeply sympathized.

We are recruiting new members to strengthen our team.

We added new members to reinforce our team.

He raised his voice to emphasize that point.

He devoted his life to pursuing a utopia.

We are participating in mutual aid activities in our community.