Number sense is not the ability to

Number sense is not the ability to count. It is the ability to recognize a 1 in number. Human beings are born with this ability. 2 ，experiments show that many animals are, too. For example, many birds have good number sense. If a nest has four eggs and you remove one, the bird will not 3 . However, if you remove two, the bird 4 leaves. This means that the bird knows the 5 between two and three.
Another interesting experiment showed a bird's 6 number sense. A man was trying to take a photo of a crow(乌鸦)that had a nest in a tower, but the crow always left when she saw him coming. The bird did not 7 until the man left the tower. The man had an 8 .He took another man with him to the tower. One man left and the other stayed, but they did not 9 the bird. The crow stayed away until the second man left, too. The experiment was 10 with three men and then with four men. But the crow did not retu rn to the nest until all the men were 11 .It was not until five men went into the tower and only four left that they were 12 able to fool the crow.
How good is a human's number sense? It's not very good. For example, babies about fourteen months old almost always notice if something is taken away from a 13 group. But when the number goes beyond three or four, the children are 14 fooled.
It seems that number sense is something we have in common with many animals in this world, and that our human 15 is not much better than a crow's.

結果 (中文) 1:

数感不是计数的能力。它是识别 1 数量的能力。人类天生就具有这种能力。2，实验结果表明，许多动物也是一样。例如，很多鸟类有良好的数感。如果巢中有四个鸡蛋，你删除其中一个，这只鸟会不 3。然而，如果你删除两个，那只鸟 4 叶。这意味着这只鸟知道在两至三个 5。另一个有趣的实验表明 ︰ 一只鸟 6 数感。一个人试着要生了一窝在一座塔，一只乌鸦 （乌鸦） 但乌鸦总是离开时她看见他走过来的一张照片。那只鸟没有不 7，直到那人离开塔。这个男人得 8。他与他的另一名男子到塔。一个人离开，另留了下来，但他们不 9 鸟。乌鸦待在一边，直到第二个男人离开了，太。实验是 10 有三名男子与四名男子。但直到所有的男人都是 11，乌鸦做不再生产 rn 的窝。它是不直到五名男子走进塔，只有四岁离开，他们得以骗乌鸦 12。一个人的数感是多么的好？它不是很好。例如，大约十四个月大的婴儿几乎总是注意到是否东西被没收 13 组。但当数超出了三或四，这些孩子是被愚弄的 14。它似乎数感是我们与这个世界上，很多动物一样的东西，并不比一只乌鸦好多我们人类 15。

結果 (中文) 3:

数字感是不算。它是一种识别1个数字的能力。人是天生的，有这种能力。2，实验表明，许多动物是，太。例如，许多鸟类有很好的数字感。如果一个巢有四个鸡蛋，你删除一个，鸟不会3。但是，如果你去掉两只，那只鸟4片叶子。这意味着，这只鸟知道两者之间的5和三。另一个有趣的实验表明，鸟类的6个数字感。一个男人正在试图把一只乌鸦的照片（乌鸦），曾在塔窝，但乌鸦总是让她看见他来的时候。那只鸟没有7，直到那人离开了那座塔。那人有8个，他带着另一个男人到了那座塔。一人离开，另一人留下，但他们没有9只鸟。乌鸦离开了，直到第二人离开时。实验三人，10人，四人。但乌鸦没有回来，鸟巢直到所有的人都是11岁。直到五人进入塔和四只留下他们12能愚弄乌鸦。人类的数字有多好？这不是很好。例如，十四个月大的婴儿几乎总是注意到，如果有什么东西被带离13组。但是，当数量超过三或四，孩子是14个愚弄。在这个世界上，我们与许多动物有着共同的意识，这似乎是一件很有意义的事情，而我们人类的15个并不比乌鸦好得多。