定义
a traffic light: 红绿灯
- "Just carry along this road for about a block, and then you take a left at the traffic lights."
- "Studies show that the current "traffic light" labelling system - red, amber and green labels representing the amounts of salt, sugar, and fat - for foods on sale in supermarkets is reasonably common, but not effective enough in reducing obesity."
进一步了解…
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他们的意见 :
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