释义
the standard time in a zone including the eastern states of the US and parts of Canada, specifically
（美国、加拿大的）东部时间，尤指：
the standard time in a zone including eastern Australia, based on the mean solar time at the meridian 150°E. It is ten hours ahead of GMT, or nine hours ahead when summer time is observed.
（澳大利亚的）东部时间（包括澳大利亚东部的一个标准时区，为东经１５０°的标准时间，比格林尼治标准时间早１０个小时，其夏令时比格林尼治标准时早９个小时）。