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- Some problems about the semimicroqualitative analysis of the unknown solution containing common anions are discussed,and some improvements are promoted on the step of anions qualitative analysis. 通过对常见阴离子未知混合液半微量定性分析的一些问题的讨论,对阴离子分析时的某些步骤提出一点改进性意见。
- The leading role is played by a complete unknown. 演主角的是一个毫无名气的演员。
- The star of the film is a previously unknown actor. 这部电影里的明星以前是个默默无闻的演员。
- It may take a long time to find a solution to the problem. 也许要花很长时间才能找到解决这个问题的办法。
- Its greater part is unknown to me. 它的大部分对我是未知的。
- He was an unknown painter one year ago. 一年前,他还是一个不为人知的画家。
- I simply refuse to conceive of such a solution. 这样的解决办法,我是绝对不考虑的。
- This is a fact hitherto unknown. 这是一个至今无人知道的事实。
- A quantity of unknown numerical value. 未知数数值不明的一个数量
- What color is copper sulphate solution? 硫酸铜溶液是什么颜色?
- Kate is in bad with Lucy for some unknown reason. 因为某些不为人知的原因,凯特和露西关系不好。
- Mary is sceptical about the solution. 玛丽对这个解决办法表示怀疑。
- We use x as the symbol for an unknown quantity. 我们用x表示一个未知数。
- It is no safe wading in an unknown water. 不知水深浅,涉水不安全。
- His problem did not really admit of any solution. 他的问题真是没有解决的可能。
- The investigation was tabled for reasons unknown. 不知何故调查延缓进行。
- He doped out a solution to the problem. 他想出一个解决该问题的方法。
- The ownership of the house is still unknown. 这栋房子的所有权至今无人知道。
- The unknown number can be calculated from the data. 通过已知数可以算出未知数。
- The solution to this problem is acceptable. 这个问题的解决方案是可接受的。