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1·By 2000, Du Yan I am going to continue to astronomical time.

到了2000年，我准备读研，继续读天文。

2·That's actually a pretty dramatic change on astronomical time scales.

在天文时间表上这实际上是相当戏剧性的变化。

3·A leap second is added in order to keep UTC within 0.9 seconds of observed astronomical time.

添加闰秒是为了将UTC保持在观察到的天文时间的0.9秒范围内。

4·Anomalies of astronomical time-latitude residual before earthquakes are considerably general phenomena.

天文时纬残差震前异常是一种相当普遍的现象。

5·The short-period anomalous fluctuations of observations of astronomical time and latitude before major earthquakes were discussed.

本文讨论了大地震前天文时间和纬度观测结果的短周期异常波动涨落。

6·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。

7·The question of the cause of the anomalous deviation of the results of the astronomical time and latitude determinations before a strong earthquake has been analysed in this paper.

本文分析了引起强震前天文测时测纬异常现象的原因问题，认为这种异常主要是地下水活动引起垂线变化的结果。

8·In117bc zhang heng of the east han dynasty manufactured the water-driven celestial globe a large astronomical time-measuring apparatus that had the primitive function of a mechanical time measurer.

公元前117年，东汉的张衡制造了大型天文计时仪器——水运浑天仪，初步具备了机械性计时器的作用。

9·It turns out, however, that there are 365.24219 days in an astronomical tropical year-defined as the time it takes the sun, as seen from Earth, to make one complete circuit of the sky.

尽管这样，实际上在天文上一回归年中有365.24219天——一回归年指的是由地球上观察，太阳在天空运行一整个圆周所用的时长。

10·But by firing its three ion engines one at a time over 620 days — accumulating another 60 miles per each day — Dawn has reached its current astronomical speed and has no plans of slowing down.

但是在620天的时间里开动了三个引擎之一——再积累每天60英里——曙光号就已达当前的天文速度，而且没有减速的计划。