It will never be known how and when this numeration ability developed, but it is certain that numeration was well developed by the time humans had formed even semi-permanent settlements.
我们永远也不会知道这种计算能力是何时、如何发展起来的，但可以肯定的是，在人类形成半永久定居点的时候，这种计数法已经发展得很好了。
Though it is unclear as to what their aims are, it is certain that they must be stopped at all costs.
尽管还不清楚他们的目的究竟是什么，但是可以确定的是必须不惜一切代价阻止他们。
Whether you agree with the evidence or not, it is certain that there has been a global shift in thinking.
不管你是否同意这个证据，全球正在转变思维这一点是肯定的。
No marriage was possible between them; not even that of souls; and yet, it is certain that their destinies were wedded.
在他们之间是不可能有什么结合的，甚至连灵魂的结合也不可能，而他们却又相依为命。
From tests on his teeth, it is certain that he spent his childhood in central Europe.
从对他牙齿的检验来看，他的童年一定是在中欧度过的。
But, although it is certain that some things will go wrong in Libya, it is far from certain that everything will go wrong.
虽然可以肯定的是在利比亚有些事情会出问题，但是，远远不能确定所有事都会出问题。
Yet it is certain that the power to produce this delight, does not reside in nature, but in man, or in a harmony of both.
然而，可以肯定地说，这欢悦的力量不仅源于自然本身，它存在于人，或者说，存在于自然和人的和谐中。
Whatever else may be doubted, it is certain that anything you can bump into must be real; this is the plain man's metaphysic.
至于其他的东西就有待考证了，但是确定的一点是，凡是你能触到的东西一定是真实的，这就是大多数人的玄学体系。
If you only learn the grammar rules by heart and dont do enough exercises, it is certain that you cant understand them perfectly.
如果你仅仅牢记语法规则而不做足够的练习，你肯定不能充分理解它们。
As the Chinese prospects keep maturing, it is certain that China will become increasingly relevant in the international basketball scene.
当中国的前景逐渐成熟，中国必定将在国际篮球中占有一席地位。
In Thailand, a person may not get married in his life, but it is certain that he will go to school and graduate with an unforgettable graduation ceremony.
在泰国，一个人可能一生不会结婚，但是他会上学，会毕业，会拥有一个风光的毕业典礼。
I don't know, but it is certain that as the world develops its global economy, the condition of one country will certainly have a big impact on many others.
我也不清楚，但肯定的是随着经济的全球化，一个国家的经济状况无疑会对其他国家造成很大的影响。
According to the analysis of products in photooxidation and dark oxidation, it is certain that the oxidation in our condition proceeds through a free radical mechanism.
根据蒎烯光氧化和暗氧化反应产物的分析，可以肯定蒎烯在本工作实验条件下的氧化反应是通过自由基机理而进行的。
Though the application of data mining in medical field just began. it is certain that the method will be widely used in medical field with the popularization of data mining.
目前数据挖掘技术在医学领域的应用尚处于起步阶段，但随着该方法的日益普及，其必将在医学领域得到更加广泛的应用。
It is certain that you will think the red one is heavier.
当然你会认为红色的更重。
It is certain that he will hand over his business to his son when he gets old.
他老的时候，一定会把生意移交给他的儿子。
It is certain that we can narrow the generation gap to live a more harmonious life.
可以肯定的是，我们可以缩小代沟过上更和谐的生活。
It is certain that if there are fewer people driving, there will be less air pollution.
可以肯定，如果开车的人少一些，空气污染就一定会减少。
It is certain that the tenor and the vehicle of rhetorical figure are in essence different.
比喻的本体和喻体必须是本质不同的事物。
It is certain that her most wonderful time was the last decade after the arrival of Manager Wenger.
她经历的最辉煌时段无疑是主教练温格到来后的上一个十年。
It is certain that some objective factors such as field, weather, environment can affect the matches.
场地、气候、环境等客观因素对比赛的影响是肯定的。
It is certain that you'll make rapid progress when you have found the correct ways of learning English.
有一点可以肯定，当你发现了正确的学习英语的方法以后，你就会取得迅速进步。
It is certain that cutting down the trees greatly and using the pesticide will disturb the balance of nature.
大量地砍树和使用杀虫剂肯定会扰乱生态平衡。
It is certain that my life is full of ups and downs but I won't and don't need to share all of them in public.
当然，我的生活肯定充满了酸甜苦辣咸，但我不会也没有必要在公开场合大肆宣扬我经历的一切。
It is certain that human Beings will continue its association with technology and will become more reliant upon it.
可以肯定，人类在未来仍将与科技为伍，并且会愈来愈依赖它。
It is certain that this process will continue, and people will keep inventing new words and new ways of saying things.
可以肯定的是，这样的变化过程还会持续，人们还会不断发明新的词汇和新的表达法。
It is certain that this process will continue, and people will keep inventing new words and new ways of staying things.
可以肯定的是，这样的变化过程还会持续，人们还会不断发明新的词汇和新的表达法。
It is certain that the research for the application of ANN in petroleum science is important in terms of theory and practice.
神经网络方法在石油科学中的应用研究，具有重要的理论和现实意义。
It is certain that the research for the application of ANN in petroleum science is important in terms of theory and practice.
神经网络方法在石油科学中的应用研究，具有重要的理论和现实意义。
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