It challenges the assumption that rich countries need long hours to stay competitive.
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机器人租赁值得观察，但远未到可以盲目乐观的阶段。它不是骗局，但也绝非稳赚。
Imagine a vast shopping mall parking lot with thousands of individual parking spots and internal lanes (representing road segments within a cluster). No matter how complex it is inside, there are usually only a few key exits to the main roads. Our goal was to identify these natural "exits" for each map cluster. For instance, the complex road network around Amsterdam Airport Schiphol (see on OpenStreetMap) has many internal roads but limited primary access points.
Tony Jolliffe/BBC News