她现在认识马克斯也好几年了，但是他仍然是个大大的未知数。
She had known Max for some years now, but he was still pretty much an unknown quantity.
在一些数学练习中，字母“x”通常代表一个未知数。
The letter "x" often represents an unknown number in some Math exercises.
佩林和赫卡比还是未知数。
另一项重要的未知数，是全球化拆解的程度。
Another important unknown is the extent to which globalisation unravels.
两院能否达成妥协尚是未知数。
估值总是有变化，且变化与未知数或风险成比例。
Estimates will always have a variance, and the variance is proportional to the unknowns or risk.
何时能研究出最好的健身方法还是未知数？
These are just some of the dilemmas many of us face when working out the best way to get fit.
在预测行业里面，“已知的未知数”被称作不确定性。
In the forecasting business, "known unknowns" are called uncertainties.
但真正的交战双方是否会接受还是个未知数。
Yet it remains unclear whether the actual belligerents will accept it.
是否是毒贩子的防抓伎俩提高了还是未知数。
Whether this reflects a drop in trade or the traffickers' increasing skill in avoiding capture is unclear.
但是，雪花会征服多少出口市场还是个未知数。
It remains to be seen, however, how much of an export market there is for Snow.
如此多的未知数令聪慧地把握你力所能及之事显尤为关键。
With so much unknown, it makes sense to be smart about the things you can control.
消费者是否喜欢UP应用程序的用户界面也是一个未知数。
警方暂未确认死因，因此关于她的死因还是个未知数。
Police have not determined a cause of death, and much remains unknown about the circumstances of her demise.
父母年龄是如何加大孤独症风险的仍是未知数，但存在一些假设。
How parental age increases autism risks remains unknown, but several hypotheses exist.
由于存在大量的未知数，管理机构在安全问题上出现了巨大的空白。
To account for a large number of uncertainties, regulatory agencies build in huge margins of safety.
至于棘手的社会问题会不会有效的得到解决仍是个未知数。
Whether intractable social problems can be solved quite so magically is open to doubt.
有一小部分重要而快速的改变是难以预料到的 --已知的未知数。
There is a small set of fast moving important change that is hard to predict -- the known unknowns.
未来的几年，我们将面对一个变化多端、充满未知数的世界。
The next few years will bring more rapid changes and surprises.
1996年，当他初到北伦敦时，这个法国人还只不过是个未知数而已。
The Frenchman was an unknown quantity when he arrived in north London back in 1996.
因勘探不足，该国的潜在石油和天然气储量在很大程度上仍是个未知数。
A lack of exploration means the country's oil and gas potential remains largely unknown.
直到最近才成为罗塞夫竞选麻烦的堕胎问题目前仍是个未知数。
And abortion, until recently an electoral problem only for Ms Rousseff, is now a wild card.
但即使受邀，利夫尼是否会加入内塔尼亚胡政仍然是个未知数。
But it is not clear that Ms Livni would join Mr Netanyahu's government, even if invited.
然后是未知数向量，未知数向量我们经常用X表示，大写的X。
Then there is the vector of unknowns. Here we’ve got 2 unknowns.
但是现在自民党的影响力正在削弱，选举竞争结果还是个未知数。
But the LDP's electoral machine is now weakened, and the outcome of the race is in doubt.
驾驶员是否愿意将刹车责任交给与他们头部相连的电脑还是个未知数。
Whether drivers would feel comfortable handing over any braking responsibility to a computer hooked up to their head is another question.
但是，英国专家们强调，这项工作仍处于早期阶段，长远的潜在好处还是未知数。
But UK experts have stressed the work is still at an early stage, and the potential longer benefit is unknown.
就预测未来的未知数而言，它根本帮不到我们，因它只适于我们现有的训练数据。
That won't help us at all in predicting future unknowns, since it's perfectly suited only for our existing training data.
就预测未来的未知数而言，它根本帮不到我们，因它只适于我们现有的训练数据。
That won't help us at all in predicting future unknowns, since it's perfectly suited only for our existing training data.
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