If the A* calculation for a shortcut (in Step 3) finds it's now impassable, or if its actual detailed cost is significantly different (e.g., 20%) from the pre-calculated shortcut value:
在校园里，孩子们时常举起戴在手腕上的手表，彼此一碰，便加为好友。
。业内人士推荐旺商聊官方下载作为进阶阅读
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（八）协助人民政府或者街道办事处做好与居民利益有关的其他工作；