由于Threshold字段中的值是动态变化的，所以州或属国的颜色会根据这个州的食品券参与率而改变。
As the value in the Threshold field changes in the animation, the color of a state or territory changes based on the food stamp participation rate of that state.
据英国媒体报道，该国科学家发明出一种智能食品包装袋，如果袋内食物变质，袋子就会改变颜色。
An intelligent food wrapping that changes color if the contents are going bad has been created by British scientists, UK media reported.
据英国媒体报道，该国科学家发明出一种智能食品包装袋，如果袋内食物变质，袋子就会改变颜色。
An intelligent food wrapping that changes color if the contents are going bad has been created by British scientists, UK media reported.
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