biotite ['baɪətaɪt]

例句:

• Weiya complex, eastern Tianshan: Single - sourced or diverse - sourced ? -- Evidence from biotite.
  东天山尾亚杂岩体: 同源还是异源? -- 来自黑云母的证据.
  
• Biotite is a subordinate constituent of the mafic and ultramafic rocks generally.
  黑云母一般是镁铁质及超镁铁质岩石中的次要成分.
  
• So the dark mica in this granite should be called biotite.
  那么.在这块花岗岩中的黑色云母类矿物就应当叫做黑云母了.