它使用定量数据和数学模型作为分析工具，研究这些人口在过去、现在和未来的情况。
It studies these populations in the past, present and future using quantitative data and mathematical models as tools of analysis.
不幸的是，使用简单的定量指标来评估研究人员的价值的长期成本可能是相当大的。
Unfortunately the long-term costs of using simple quantitative metrics to assess researcher merit are likely to be quite great.
今年6月，美国联邦通信委员会对美国电话电报公司处以1亿美元罚款，原因是该公司被指控在用户使用了一定量的数据后，偷偷地降低了无线网速。
Back in June, the Federal Communications Commission fined AT&T $100 million over accusations that the carrier secretly reduced wireless speeds after customers consumed a certain amount of data.
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