| 释义 |
standard timen.（名词）abbr. ST【缩写】- The time in any of 24 time zones, usually the mean solar time at the central meridian of each zone. In the continental United States, there are four standard time zones: Eastern, using the 75th meridian; Central, using the 90th meridian; Mountain, using the 105th meridian; and Pacific, using the 120th meridian.标准时：24个时区的任何一个时区，通常指每个时区中间子午线的平均太阳时间在美国大陆有4个时区：东部时区使用第75度子午线；中部时区使用第90度子午线；山区时区使用第105度子午线；太平洋时区使用第120度子午线
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