And,what the green economy is, it's an alternative that doesn't do all that."
VOA: standard.2010.02.24
One is that there's four different colors and so you can see red, blue, yellow, green here - four different colors and that's all there are, there aren't more than four.
一是这些梯阶有四种不同颜色,你可以看到红 蓝 黄 绿,恰恰只有四种不同颜色,不多不少
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