中文字幕精品视频在线|中文字幕在线观看|亚洲v日本v欧美v在线播放|伊人网中文字幕

<nav id="3u6n6"></nav><samp id="3u6n6"><tr id="3u6n6"><track id="3u6n6"></track></tr></samp>
    <legend id="3u6n6"><fieldset id="3u6n6"></fieldset></legend>

      
      

    1. 首頁英語詞典dentindentin英英釋意

      dentin

      英 ['dent?n] 美['d?nt?n]
      • n. 象牙質(zhì);牙質(zhì)(等于dentine)
      • n. (Dentin)人名;(法)當坦

      英英釋意


      1. a calcareous material harder and denser than bone that comprises the bulk of a tooth
      2. bone (calcified tissue) surrounding the pulp cavity of a tooth