After six agonising minutes, Jack Swigert's voice cut through the silence.
lowerdir is the read-only directory (composefs) containing file metadata, and datadir is the directory containing the data (erofs).
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新建大型数据中心PUE必须低于1.25，国家枢纽节点低于1.21。液冷、余热回收、智能节能强制普及，单位算力能耗持续下降，形成“降碳=降本”的正向循环。
A quadtree reduces this: rebuild the tree each frame, and for each object, query only the nearby region. Objects in distant quadrants are never compared.
const stepName = currentStep.type === 'Command' ? currentStep.cmd.name || 'anonymous' : currentStep.type;