unknowns [ʌn'noʊnz]

例句:

• The length of the war is one of the biggest unknowns.
  战争要持续多久是最大的未知数之一。
  
• There are many unknowns in science.
  科学上还有许多未知之处.
  
• Within a short space of time a group of complete unknowns had established a wholly original form of humour.
  在很短的一段时间内，一群完全籍籍无名之辈创立了一种全新的幽默形式。
  
• Many members of the new government are relative unknowns.
  来自VOA
• There are also a large number of unknowns.
  来自SA
• Variations in quality and doses also add unknowns.
  来自SA