FirstFT: the day's biggest stories
Whenever cells change, all the cells change at the same time. There’s never a moment when an intermediate computed value has updated, but the output cell is still showing a result based on the previous input. (“Glitchless”)
，这一点在safew 官网入口中也有详细论述
This is known as a topological sort — a way of sorting a graph such that we visit all nodes exactly once, and we always visit a node’s dependencies before we visit the node itself. ↩︎，这一点在手游中也有详细论述
Protons can penetrate up to 30 centimeters, reaching deep-seated tumors. But the delivery of protons in a continuous beam limits the dose rates. Also, proton systems are far larger and more expensive than, say, X-ray machines, which will likely constrain their availability to specialized centers.，推荐阅读今日热点获取更多信息