常見例句雙語例句To investigate the effect of survey design, specifically the number of items and recall period, on estimates of household out-of-pocket and catastrophic expenditure on health.研究家庭預算外健康開支和大病治療開支的估算調(diào)查設計（尤其是項目數(shù)量和回憶期）的效果。 返回 survey on household expenditure