expiration[英][ˌekspəˈreɪʃn][美][ˌɛkspəˈreʃən]n.呼气; 截止; 满期; （气的）呼出; 例句:1.Some analysts blamed the price plunge on trading around the expiration of the october wti option contracts on monday. 一些分析师认为，油价暴跌的原因在于10月份交割的西德克萨斯中质油期权合约将于周一到期。

2.This is partly due to the planned expiration of the bush-era and other tax cuts and partly to spending cuts agreed to last year. 部分原因是布什政府时期制定的减税措施和其他一些减税措施按计划将到期，还有部分原因是去年达成的减支方案。