frontier

language: zh

definitions

  1. noun
    a border region between two countries or areas; the edge of known territory
    zh: 边界地区；未知领域的边缘
  2. noun
    the state of being at the edge of knowledge or experience; pioneering
    zh: 探索未知；开拓

examples

  1. the American frontier

    美国边疆

  2. on the frontier of science

    科学前沿