There are three major classes of groundwater vulnerability assessment methods: overlay and index methods, methods employing process-based simulation models and statistical methods.
地下水脆弱性评价方法主要有三类：迭置指数法，过程数学模拟法和统计方法。
The index system in power emergency system vulnerability assessment was compiled by using comprehensive indexes.
采用脆弱性评估中的综合指标法，编制了评估电力应急体系脆弱性的指标体系。
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