In chemistry, the synperiplanar arrangement plays an important role.

He worked hard to accomplish his goals.

In this project, the arrangement of resources is very important.

We need to allocate resources for the new project.

His role is the team leader.

Health is very important.

His opinion is very important.

He is majoring in chemistry at university.

He is an expert in chemistry.

He received the letter challenging him to a duel and began preparing for the duel.