est. 基本例句 abbr.established 建立; estate 不动产 Shuttle program managers made the decision at7:24 a. m. EST after a failure occurred in a fuel sensor system while Atlantis' external fuel tank was being filled. 美国东部时间商务7点24分,航天飞机项目管理人员作出了该决定,原因是因为在外部燃料箱加注燃料时,一个燃料传感器系统发生了故障。 www.etiri.com.cn