The conditions you have to meet are specific to the color-coded spaces. For example, if it provides a single number, every side of a tile in that space must add up to the number provided. It is possible – and common – for only half a tile to be within a color-coded space.，这一点在新收录的资料中也有详细论述
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“美国想要实现这一目标并不容易，最终很可能只会留下又一个烂摊子，未必能达成其预设目的。”