classes: lecturer. Practice engine room is weak, the machine runs slowly or sluggish, sometimes broken, the network to assist us to save in the engine room is slow. curriculum. Practice engine room is weak, the machine runs slowly or sluggish, sometimes broken, the network to assist us to save in the engine room is slow. facility. Practice engine room is weak, the machine runs slowly or sluggish, sometimes broken, the network to assist us to save in the engine room is slow. general. Practice engine room is weak, the machine runs slowly or sluggish, sometimes broken, the network to assist us to save in the engine room is slow.