未知数

Mr. Wu said that when the police relatives told him that this camera can be wireless transmission, but is still in use or have used, there is no videotaping what, is unknown.

吴先生说，当警察的亲戚告诉他，这款摄像机能够无线传输，但是否还在使用或曾经用过，有没偷拍到什么，都是未知数。

In Chapter Seven, This chapter established on the comparison of the Fibonacci's Liber Abaci, al-Khwārizmī'algebra and al-Karajī's al-Fakhrī.

本章建立在对斐波那契《计算之书》、花拉子米《代数》、以及凯拉吉的《奇妙之事》中代数学比较研究基础之上，分析他们在代数技巧、代数方法有效性的证明方法、未知数设定、二次方程分类、算题选择和设置形式等方面的异同。

It is not yet known when Cech will return to action, and although enjoying his time deputising for the Czech goalkeeper, Hilario is anxious to see the first choice return as soon as possible to help the team's title push.

切赫何时归来至今仍是个未知数，虽然希拉里奥享受着作为捷克门神替代者的时光，但他仍然迫切地希望这位正选门将能尽早复出、以推动球队的夺冠大业。

He and Agger are maybes but perhaps it will be easier for Agger than for Benayoun.

他与阿格能否出场都还是未知数，但或许阿格尔上场的可能性会更大一些。

It is unknown whether these cut points are appropriate for non-European populations.

而这个界定点是否适合欧洲以外的人群仍是未知数。

Some scientists stress that the research is limited, and there are many unknowns.

一些科学家强调，他们的研究是有限的，有很多未知数。

When you have larger projects, there will be more unknowns that you can't judge for in complexity and time.

当你有了更长远的计划，还会有更多的未知数、无法判断的复杂情况以及时间安排。

Research in areas such as new materials and improved blade design will provide incremental improvements to high-bypass turbofans. But it is unclear whether these will be enough to achieve the required fuel savings. A completely new type of engine may be needed.

新材料与叶片设计等方面的研究将会使高旁通比涡扇发动机获得不断的改进，但是否能够达到预期的节油目标还是个未知数，也许还需要研制一种全然不同新型发动机。

Questions in this content area are based on basic operations using whole numbers, decimals, fractions, and integers; place value; square roots and approximations; the concept of exponents; scientific notation; factors; ratio, proportion, and percent; linear equations in one variable; absolute value and ordering numbers by value; elementary counting techniques and simple probability; data collection, representation, and interpretation; and understanding simple descriptive statistics.

这方面的考试内容包括实数、小数、分数和整数的基本运算；位值；平方根和近似值；指数的概念；科学记数法；项；比率，比例以及百分比；只有一个未知数的线性方程；绝对值和数值的排列；初级的计数技巧和简单的概率；数据的收集、整理与说明；并理解简单的描述性统计数据。

There is greater transparency in Latin American economic decision-making, but Brazil is the region's wild card.

拉丁美洲各国的经济决策有了较大的透明度，巴西却是这个地区的未知数。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。