sigma ['sɪɡmə]

例句:

• Summations are almost invariably indicated ellipses instead of the more prevalent sigma notation.
  在表示“连加”的式子中,几乎一成不变地使用省略号来代替更为流行的“∑”符号.
  
• The agreement with SIGMA anti - measles IgG EIA kit was 95.12 %.
  与SIGMA麻疹IgGEIA诊断试剂盒的一致率为95.12%.
  
• PCNA also employed Six Sigma quality processes.
  PCNA也使用六Sigma质量程序.
  
• This seems like a application of six sigma techniques.
  来自SA
• That is partly because the five-sigma concept is somewhat counterintuitive.
  来自WSJ
• In particle physics, three sigma counts as "evidence".
  来自BBC