Just when the magnetic field will flip is impossible to predict from what is known at the moment; the best guess is that there are still several centuries to go.
到底什么时候磁极将会颠倒从目前已知的证据中去预测还不能做到，但对此最适宜的猜测便是那一天的到来是好几个世纪以后的事情了。
Each handles some of the deadliest organisms known to man and animals: diseases that are highly infectious, fatal even in low doses and impossible to treat.
每所实验室都负责研究一些在人类和动物身上已发现的最致命的生物体：具有高度传染性的疾病，哪怕是很小剂量也会致命，而且绝无治疗的可能。
Second, it's impossible for the realities of China's education system to change quickly . I can say that this book, compared to the books of well-known specialists and scholars, is in no way inferior.
第二，中国教育的现实它不可能改变得很快，我可以这样说，这本书拿给那些著名的专家学者的书当中一点也不逊色。
However, SP and SQ are only known at run-time of application which complicates or makes impossible to make certain well-known compile-time optimizations.
然而只在程序运行时知道SP和SQ，这使复杂或不可能去确定必然知道的最优化编译时期。
Spanning 10 acres, the 220-year-old tree – known as 'apple tree colony' – has dozens of individually rooted trunks that constantly spring to life, making it seemingly impossible to die.
这棵名为“苹果树殖民地”的果树占地10英亩，已达220岁高龄。全树有几十根树干扎根土中，枝繁叶茂，仿佛永生一般。
In this paper, how to forecast the traffic flow oft he road by using the known information especially the statistical data in the statistical Yearbook when od survey is impossible is introduced.
主要解决如何实现在无现状调查OD的情况下，充分利用已知信息，特别是《统计年鉴》中的统计数据，预测路段交通量。
In this paper, how to forecast the traffic flow oft he road by using the known information especially the statistical data in the statistical Yearbook when od survey is impossible is introduced.
主要解决如何实现在无现状调查OD的情况下，充分利用已知信息，特别是《统计年鉴》中的统计数据，预测路段交通量。
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