在林带上部，有林带间的阻滞减速区和林带后的涡旋减速区，在林带顶后部有集流加速区。
In the upper layer, there are the blocking speed-down zone inter-belt, the whirling speed-down zone behind the belt, the conflux accelerating zone just behind the top of shelterbelt.
他们发现了49个这样的区域，并称之为“人类加速区”(HARs)，这些区域均表现出近期发生过快速进化的迹象。
They found 49 regions they dubbed "human accelerated regions" (HARs) that have shown a rapid, recent evolution.
更重要的是，最新的数据显示，当前美国的生产力增长正在放缓，而欧元区的生产力增长则在加速。
Even more important, the latest figures suggest that, whereas productivity growth is now slowing in America, it is accelerating in the euro zone.
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