详细解释:n. 推磨的人, 研磨者
【化】 磨床; 磨木机; 研磨机
【医】 磨牙, 磨[床]工
英语解释：
名词 grinder:
a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States同义词：bomber, hero, hero sandwich, hoagie, hoagy, Cuban sandwich, Italian sandwich, poor boy, sub, submarine, submarine sandwich, torpedo, wedge, zep