That idea is just right, exactly what we needed.

His body showed a rejection reaction to the transplanted organ.

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

This chemical reaction is very dangerous.

She overreacted to his words.

Nuclear reactions are used for mass production of energy.

I was surprised by his overreaction.

We have started the production of new products.

We have started the production of new products.

We need to finish all settlements by the end of this month.