mean solar times造句

• The equation of time, which transforms the true solar time into a mean uniform time, the so-called mean solar time .
  时差，将真太阳时转换为平时，即平太阳时。
• Greenwich mean time ( gmt ) is mean solar time at the royal greenwich observatory in greenwich, london, england, which by convention is at 0 degrees geographic longitude
  格林尼治国际标准以英国伦敦格林威治皇家天文台为准，也就是零经度为准。