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- We use x as the symbol for an unknown quantity. 我们用x表示一个未知数。
- The new sales director is still a bit of an unknown quantity. 新来的销售部主任大家还不大了解。
- The new teacher is still very much an unknown quantity but we have hopes that he will be a valuable member of our team. 新教师是谁现在还难以预料，但我们希望他会成为我们队里的重要一员。
- You must eliminate an unknown quantity. 你必须消去一个未知数。
- We are facing an unknown purpose, unknown quantity. 们常常是对着一个未知数而前进。
- Our new director is still an unknown quantity. 我们对新来的主管知之甚少。
- In algebra the sign x usually denotes an unknown quantity . 在代数中，符号x通常代表一未知数。
- In algebra the sign x usually denotes an unknown quantity. 在代数中,符号x通常代表一未知数。
- In algebra, the sign x usually denote an unknown quantity. 在代数中，x符号通常代表一未知的量。
- In algebra, the sign X usually denotes an unknown quantity. 在代数里, 符号X常用来表示未知数。
- His ability to make decisions in a crisis is an unknown quantity. 他在危机中作决定的能力还是个未知数。
- To remove(an unknown quantity) by combining equations. 消去通过等式合并消去（一个未知量）
- What we would find if we could fly to the moon is an unknown quantity. 如果我们能飞到月球上去，在那里我们将会发现什么，这是很难以预料的。
- John is a possibility for the job,but he is still an unknown quantity. 约翰可能获得这工作但现在还是个未知数。
- John is a possibility for the job, but he is still an unknown quantity. 约翰可能获得这工作但 (能否获得) 现在还是个未知数。
- An equation in which the highest power of an unknown quantity is a square. 未知量的最高幂是平方的等式。
- I don't know what the new man will do; he's still an unknown quantity. 事情的结果还是个未知数。
- The new teacher is still very much an unknown quantity but we have hoped that he will be a valuable member of our team. 新教师是谁现在还难以预料,但我们希望他会成为我们队里的重要一员。
- The new teacher is still very much an unknown quantity but we have hopes that he will is a valuable member of our team. 新教师是谁现在还难以预料,但我们希望他会成为我们队里的重要一员。
- Phrases like "a number" or "the number" tell us our expression has an unknown quantity, called a variable. 像"一个数"或"这个数"之类的短语，告诉我们表达式中含有一个未知量，称之为变量。
