time sight

短语

词形变化

time sights 复数 time sights

释义与例句

n.
  1. 1.

    An observation by sextant of the altitude of a celestial body in order to determine the time and hence the longitude.

    可数 不可数
  2. 2.

    A set of observations in order to determine the time that is usually conducted with a transit instrument.

    可数 不可数