Anyone would like to correct this sentence for me ,please ? I translated a Chinese sentence , please check it out , thanks . ' There are only two firms in the world produce the engine of big passenger aircraft . It's not that there's too much technology ,but for the manufactured engine ,the requirement of reliability is extremely high. If errors occur to the engine during the flight, the plane is most likely to fall from the sky. ' I wonder if I did it in a very 'Chinese' expression .