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