例句
同义词
柯林斯高阶英汉双解学习词典释义
英汉词典释义
英英词典释义
  • Noun
    1. structural member consisting of a continuous horizontal timber forming the lowest member of a framework or supporting structure
    2. (geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock
行业词典
  • 体育: 舱座;
    地质学: 岩床;
    法律: 窗台;
    海洋科学: 海槛;