我国基本比例尺地形图是以国际百万分之一地图分幅为基础，按一定的经差和纬差划分图幅。
Basic scale topographic map is bases on one of million international map subdivision and divided by Longitude difference and Latitude difference.
天文时纬残差震前异常是一种相当普遍的现象。
Anomalies of astronomical time-latitude residual before earthquakes are considerably general phenomena.
在赤道这一标准差是0.5%，这就是说在30天间隔纬向平均反射率增加1%，在95%水平时统计上是显著的。
This means that a zonal mean albedo increase of 1% for a 30-day interval is statistically significant at the 95% level.
本文叙述了光学天文时纬观测资料的残差在仪器周围地区发生强地震前夕出现短期异常波动的现象。
This paper about the phenomenon of anomaly of astronomical time-latitude residuals before major earthquake occurred around observatory.
本文叙述了光学天文时纬观测资料的残差在仪器周围地区发生强地震前夕出现短期异常波动的现象。
This paper about the phenomenon of anomaly of astronomical time-latitude residuals before major earthquake occurred around observatory.
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