With a Forest of Trees index, the database architect can specify one or more of the leading columns to be used to create a hash key.
有了Forest of Trees索引，数据库架构师可以指定一个和多个引导列来创建一个hash键。
2
The correlationship between VEGETATION index and feature factors of forest resources is the basis that this remote sensing data will be used in forest resources monitoring.
VEGETATION植被指数与森林资源特征因子之间的相关性是该遥感数据用于森林资源监测的基础。
3
Multivariate linear model of measurement of forest ecological benefit was set up according to index system of measurement.