Shortcuts: For common scenarios, we pre-calculate the travel time/distance (the "shortcut") between border points within the same cluster and also to border points of immediately adjacent clusters.
（七）射线装置，是指在接通电源后方能产生电离辐射的装置，如X射线机、加速器、中子发生器等。。91视频对此有专业解读
。业内人士推荐搜狗输入法下载作为进阶阅读
Наталья Анисеева (редактор отдела оперативной информации)。爱思助手下载最新版本是该领域的重要参考
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