Rate Valley

率谷───Rate Valley

The survival mechanism of Eucalyptus with high transpiration rate in dry hot valley is for their deep root system that can actively supply water to the leaves.───桉树类树种的蒸腾速率较高，但能生存的主要机理是根系分布深，主动供水能力强，补充了地上部分的水分消耗；

unemployment rate in Silicon Valley inched upward for a fourth consecutive month in August to reach a four-year high, newly released data showed.───最新数据显示，截至八月份，硅谷失业率已经连续四个月攀升，达到四年来最高水平。

office vacancy rate in downtown stands at 21%-higher than it was four years ago, during the dotcom slump, and almost twice as high as the Silicon Valley average.───中心区办公用房的空闲率达到21%，比四年前网络经济泡沫期间的空闲率还要高，更几乎是硅谷的两倍。