Black and white bar

黑白条───Black and white bar

That's because they can now use those distinctive black and white stripes to count a population, bar code style.───因为他们可以使用斑马身上独特的黑白条纹来统计斑马的数目，就像商品条形码一样。

Bar codes, familiar to us all as the black and white rectangular mark that enables products in a supermarket to be tracked, represent data using the spacing of parallel lines.───条形码就是我们大家都熟悉的超市中用来跟踪商品的那些黑白色相间的长条标记，它利用这些黑白色平行线的间距来表示数据。

Race was once a bar to the clubs and drawing-rooms of respectable society. Now a black man is in the White House.───种族曾经是进入上流社会俱乐部和客厅的障碍，但是现在黑人已经入主白宫。

But you should pay attention to our packaging to provide a factory packing only black-and-white bar code and outside the box.───但你要注意我们的包装为工厂包装只提供一黑白条形码和外箱。