在重复观测的条件下，手持GPS测量面积的相对误差可以达到2.0％，基本满足林业生产中测量面积的精度要求。
Under the condition of re-observation, the relative errors of measuring area with the pocket GPS could reach 2.0% , which could meet the precision demand of measuring area in forestry practice.
根本就不存在什么恒星，时间与空间的测量结果取决于观测者的位置——它们都是相对的。
There are no constants at all. And measurements of time and space depend on the position of the observer-they are relative.
相对于陆上同类测量而言，海底大地电磁探测成本高，作业难度大，且不易实施数据采集的重复观测。
Compared with continental operation, there are higher risk and expenses in detecting and more difficult in acquisition repeatedly on the marine magnetotellurics.
用这种新的自洽的相对论微观光学位我们进一步讨论了核子-核散射的微分截面和自旋观测量。
The cross section and spin observables of the nucleon-nucleus scattering are studied with this new self-consistent relativistic microscopic optical potential.
并且指出了现行全球卫星定位系统运用广义相对论对卫星钟进行修正的方法，在理论上与广义相对论的观测量理论不符。
Moreover, the current GPS's corrections to the satellite clocks are not correspondent theoretically with the theory of measurement of general relativity.
并且指出了现行全球卫星定位系统运用广义相对论对卫星钟进行修正的方法，在理论上与广义相对论的观测量理论不符。
Moreover, the current GPS's corrections to the satellite clocks are not correspondent theoretically with the theory of measurement of general relativity.
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