If there were more than four dots on a page she could not count them.

如果一张纸上有多余4个点，她不能数出多与4的那些点。

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While background stars shine in the same place in each image, NEOs appear as four distinct dots along a straight line.

背景恒星会出现在每幅图像的同一个地方，而近地天体则显示为4个沿直线排列的点。

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One raven learnt to distinguish two, three, four, five and six dots.

一只乌鸦学会了区分2、3、4、5、6个点数。

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The company says that this makes the screen's pixels (the individual dots that create the image) look four times smaller than they actually are, and the overall image four times sharper.

ECONOMIST: Electronic books