The colour coding helps us to know who has had what!

颜色编码让我们知道谁已经完成了哪些事情！

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Some places use colour coding to tell people where different things are.

一些地方使用颜色编码来告诉人们不同的东西在哪里。

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Darker traces signifiy slower speeds, and colour coding shows the density of traffic in different areas.

较深色的线条表示航行速度较慢，条码的颜色代表不同区域的交通密度。

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Display different levels of threats as alerts on maps, possibly using colour coding to distinguish priority.

BBC: FBI plans social network map alert mash-up application

But she said the ideal would be to have the colour coding as well as the more detailed GDAs.

BBC: Consultation launched on how to label food

The report calls for a common EU standard for colour-coding waste for sorting and recycling, as a way of increasing recycling rates.

BBC: Debate on treatment of waste