针对“未来之城”雄安新区的建设，告诫“把每一寸土地都规划得清清楚楚后再开工建设，不要留历史遗憾”；
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Space exploration
“Building is easy now. Knowing what to build, and what not to, is the hard part,” Knecht added.
What is the maximum distance for a Wi-Fi extender?