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.
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，详情可参考91吃瓜
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聊完了软件生态的新消息，我们再看一下苹果的第二个顾虑：折痕太重。，详情可参考谷歌
Include several fonts on the same page
bit 3: ignore errors。移动版官网对此有专业解读