sub.

英 美
  • subaltern;abbr.;=subaltern
名词 sub:
  1. 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

  2. a submersible warship usually armed with torpedoes

动词 sub:
  1. be a substitute