一项由手工艺及业余爱好协会在2007年的研究表明，手工艺者创造了一个$310亿美元的产业，其指数倍的增长超过了过去十年的总和。
A 2007 study by the Craft &Hobby Association found that crafters make up a $31 billion industry, a figure that has grown exponentially over the past decade.
采用双曲线和指数曲线两种拟合方法对实测数据进行了曲线拟合计算，同时采用分层总和法对路基总沉降进行了计算。
The hyperbolic curve method and the exponential curve method are used to forecast embankment settlement of the highway around Harbin city, meanwhile total embankment settlement is calculated.
这个新指标——绿色容积率(GPR)是以一个通常被称作叶面积指数(LAI)的生物参数作为基础，该参数被定义为每单位地块面积上的单面叶面积总和。
This new metric, the green plot ratio (GPR), is based on a common biological parameter called the leaf area index (LAI), which is defined as the single-side leaf area per unit ground area.
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