n.standard time in the 4th time zone west of Greenwich, reckoned at the 60th meridian; used in Puerto Rico and the Virgin Islands and Bermuda and the Canadian Maritime Provinces
同义词：Atlantic Time
英汉双解大词典
Atlantic Standard Time
1.
N（名词）
the local time used in eastern Canada, four hours behind Greenwich Mean Time 大西洋标准时间; 加拿大东部当地时间，比格林威治时间晚四个小时 ( abbr: AST)