未知数

• A new method for blind separation of sparse sources with unknown source number
  未知数量稀疏源盲分离的一种新方法
• " yesterday is history . tomorrow is mystery . today is a gift .
  罗斯福说, "昨日是历史.明天是未知数.今日才是最值得把握的! !
• The words " less 3 " tell us to subtract three from the unknown number
  “减去3 ”这几个字，告诉我们将从一个未知数中减去3 。
• T : who can work out x according to the relationship of the parts of the division
  师：用除法各部分的关系，谁能求出未知数x ？
• How much that will help those susceptible to allergic reactions is not clear
  而这能够多大程度地影响到超敏反应还是个未知数。
• Who can work out x according to the relationship between the parts of the division
  师：用除法各部分的关系，谁能求出未知数x ？
• T : who can work out x according to the relationship between the parts of the division
  师：用除法各部分的关系，谁能求出未知数x ？
• The future is an unknown figure but we can affirm that it gives us countless hopes
  未来是个未知数，但是可以肯定的是，过去给了我们无穷的希望。
• Uncertainties remain about whether the regime will come clean about its uranium enrichment
  该政权是否会全盘交待他们的铀浓缩活动仍是个未知数。