Regulating this machine is difficult.

He used the air conditioner remote to regulate the room temperature.

He connected a new effects unit to his guitar.

This effector regulates the response of cells.

This chemical reaction is very dangerous.

This chemical reacts when heat is added.

This cell is dividing very actively.

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.