sub
名词 sub:
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, grinder, hero, hero sandwich, hoagie, hoagy, Cuban sandwich, Italian sandwich, poor boy, submarine, submarine sandwich, torpedo, wedge, zep
a submersible warship usually armed with torpedoes
同义词:submarine, pigboat, U-boat
动词 sub:
be a substitute
同义词:substitute, stand in, fill in