| 单词 | reference system |
| 释义 | reference system (once / 2363863 pages) n WORD FAMILY reference system: reference systems USAGE EXAMPLESThe International Earth Rotation and Reference Systems Service in France tracks the Earth's rotation and announces the need for a leap second. BBC(Dec 30, 2016) The International Earth Rotation and Reference Systems Service previously added a leap second on June 30, 2015. National Geographic(Jul 11, 2016) The astronomers at the International Earth Rotation and Reference Systems Service are charged with keeping track of the difference between astronomical time and atomic time. Seattle Times(Jan 10, 2015) n a system that uses coordinates to establish position Syn|Hypo|Hyper coordinate system, frame of reference, reference frame Cartesian coordinate system a coordinate system for which the coordinates of a point are its distances from a set perpendicular lines that intersect at the origin of the system inertial frame, inertial reference framea coordinate system in which Newton's first law of motion is valid space-time, space-time continuumthe four-dimensional coordinate system (3 dimensions of space and 1 of time) in which physical events are located arrangement, organisation, organization, system an organized structure for arranging or classifying |
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