基本解釋[經(jīng)濟(jì)學(xué)]巨災(zāi)風(fēng)險(xiǎn)琯理工具專(zhuān)業(yè)釋義經(jīng)濟(jì)學(xué)巨災(zāi)風(fēng)險(xiǎn)琯理工具