To analyse preterm birth rates worldwide to assess the incidence of this public health problem, map the regional distribution of preterm births and gain insight into existing assessment strategies.
分析全球早产率从而评估这个公共健康问题的发生率，绘制早产区域分布图并了解现有的评估战略。
There is something odd about central bankers denying any responsibility at all for long-term rates, which are, in principle, based partly on an assessment of a stream of short-term rates.
奇怪的是中央银行家们完全否认长期利率的任何责任，而原则上长期利率部分基于对短期利率变动的估计。
GIS based soil information system (SIS) is very important for assessment of the capacity of land production, the status, rates of soil degradation and global change studies.
地理信息系统(GIS)支持下的土壤信息系统(SIS)在评价土地生产能力、土地退化的现状、速率和风险以及全球变化研究中具有重要意义。
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