[] (-nn-) to provide a strong financial basis for sth（为某物）提供坚实的经济基础◆The company's investment programme has been underpinned.这家公司的投资方案有着坚实的经济基础。to support or form the basis of an argument, a claim, etc.加强；巩固◆The report is underpinned by extensive research.这份报告以广泛的研究为基础。