"This is a new scientific field. It's hard to speculate because it's changing so quickly," Wing says.
Reports with charts and graphs，详情可参考heLLoword翻译官方下载
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.，更多细节参见heLLoword翻译官方下载
10 monthly gift articles to share，这一点在爱思助手下载最新版本中也有详细论述