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。

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.

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陆地上空的云块这时候像山冈般耸立着，海岸只剩下一长条绿色的线，背后是些灰青色的小山。海水此刻呈现蓝色，深的简直发紫了。

The clouds over the land now rose like mountains and the coast was only a long green line with the gray blue hills behind it. The water was a dark blue now, so dark that it was almost purple.

youdao

陆地上空的云块这时候像山冈般耸立着，海岸只剩下一长条绿色的线，背后是些灰青色的小山。 海水此刻呈现蓝色，深的简直发紫了。 ！

The clouds over the land now rose like mountains and the coast was only a long green line with the gray blue hills behind it.

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