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。
It's still not known how many died in the volleys of gunfire.
尚不知道有多少人死于齐发的炮火中。
They have studied these books and known how to sort the rubbish.
他们学习了这些书，知道如何分类垃圾。
It isn't actually known how many sites there are across Australia where rock art can be found—but unfortunately, we do know that much of the art is being lost to us.
目前还不知道在澳大利亚有多少地方能够发现这种岩石艺术；但不幸的是，我们知道有很多艺术作品正在消失。
As you know, it is well known how Qi treats missioner.
可是你知道齐国对待使节阳奉阴违是出了名的。
Scientists have known how to harness the limitless power of the sun.
科学家们已知道如何利用无穷尽的太阳能。
I never would have known how valuable and fun being single was if I hadn't thought to try it.
如果我没有尝试，就永远也不知道单身是多么愉快。
If a man is proud of his wealth, he should not be praised until it is known how he employs it.
如果一个人以他的财富为骄傲，那么要看他如何运用财富，才知道他是否应该被称赞。
Although it is not known how the blocks were put in place, several theories have been proposed.
尽管人们还无法知晓这些石块是如何巧到好处地放置的，但人们已对此提出了一些看法。
I might have known a lot, but I wouldn't have known how to express it, and how to structure it.
我也许了解很多东西，但不会懂得如何去表达它，构建它。
If a man is proud of his wealth, he should not be praised until it is known how he employs it..
如果一个人以他的财富为骄傲，那么要看他如何运用财富，才知道他是否应该被称赞。
If a rich man is proud of his wealth, he should not be praised until it is known how he employs it.
如果一个富人为了他的财富而骄傲，人们在没有晓得他如何使用那些财富之前，不应对他加以称赞。
Keep in mind that it is still not known how much protein each individual must consume to attain anabolism.
一定要记住，现在关于一个人究竟要摄入多少确切数量的蛋白质才能维持合成代谢状态的问题还有没有定论。
It's not known how many people are tracked with GPS devices every year, but the devices don't always go undetected.
没有人知道每年有多少人被GPS设备跟踪，但是这种设备有时也会被人发现。
Without their constant guidance and occasional criticism, I would never have known how to be the best person I can be.
没有他们的不断指导和偶尔的批评，我就不会知道我能够如何成为最好的人。
It is not known how much of his personal fortune, which was estimated at 12.8bn in March 2008 by Forbes, had been lost.
还不能统计他个人财富的现值，但是据估计福布斯排行榜2008年8月时公布他的个人财富128亿应该已经全部不复存在。
The sudden sound of the train whistle brought me to myself; I had not known how far I had been walking, deep in thought.
我陷入了沉思，不知道已经走了多远，火车突然发出的汽笛声使我清醒过来。
Indeed, May has said that if he had known how massive Top Gear would become, he would not have joined in the first place.
事实上，梅曾说过要是早知道TopGear会这么火，当初就不加盟了。
Apple has sold more than 7.5 million iPads since April, the company reported, but it is not known how many went to schools.
苹果公司的报告称从四月份开始已经售出了7千5百万台iPad，但是尚不知道其中有多少进入到学校。
Business people for years have made good use of typewriters and adding machines, yet few have ever known how to repair them.
商人能够很好的利用打印机和添加机器，但是很少有人知道如何去修理他们。
Scar-reducing creams and other dermatological procedures can help, but no one has known how to prevent scarring in the first place.
消除疤痕膏和其他一些皮肤病的医学疗程能起到一定的作用，但是没有人知道如何在初次伤害处消除疤痕生成。
It is commonly used in situations where existence can be established but it is not known how to determine the total number of solutions.
它通常用在已知存在解决方法，但不确定方法有几个的情况下。
When when sealing a stage to open an eye, had not known how long, the grandfather is unripe by catch fire , to seal a dress that bake.
等到都封台睁开眼睛时，已经不知道过了多久，爷爷在旁边生着火，给都封台烤衣服。
Shall I think how little use I have made of my life, how I have slumbered, dozed through it, how little I have known how to enjoy its gifts?
我会想我多么少地利用过我的生命，我曾怎样昏昏噩噩地走过，我对如何享受它的赋予了解得有多么少吗？
Scientists don't precisely known how wearing red might give athletes an advantage. But the color delivers implicit messages of vigor and danger.
科学家们并不很确定穿红色衣服是如何使运动员获得优势的，但这种颜色暗含着活力和危险的信号。
It's not known how babies acquire the capacity to understand others' mental states, but some scientists have argued that conversation has a key role.
现在仍不清楚婴儿是如何具备探知他人思想能力的，但是有些科学家认为沟通起了关键作用。
It's not known how babies acquire the capacity to understand others' mental states, but some scientists have argued that conversation has a key role.
现在仍不清楚婴儿是如何具备探知他人思想能力的，但是有些科学家认为沟通起了关键作用。
应用推荐