The astronomers were taking an observation of Jupiter.
们正在观测木星。
The astronomers were taking an observation of Jupiter.
们正在观测木星。
Astronomers used to ask why only Saturn has rings.
们过去一直感到奇怪,为什么只有土星有光环。
Astronomers can accurately foretell the date,time,and length of future eclipses.
能精确地预告未来日食月食的日期、时刻和时长。
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