He is good at piloting a triplane.

He wrote a caption for the picture.

He is the third son in the family.

His body showed a rejection reaction to the transplanted organ.

She overreacted to his words.

Nuclear reactions are used for mass production of energy.

His single word triggered a chain reaction, and everything changed.

I was surprised by his overreaction.

He consented to my proposal.

Small nations have less economic influence compared to large nations.