black band

 
       
  • 菱铁矿,黑带,无火花换向区

black band的用法和样例:

例句

  1. A karate black belt chopped my knee when I sparred with him.
    我和一个空手道黑带对打时,他砍了我膝盖。
  2. The Six Sigma Black Belt will demonstrate the ability to read a fault tree.
    西格玛黑带应能示范其理解故障树分析的能力。
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