系 xiˋ
(Connect, Connection, Department, Faculty, Relationship, System, Tie)
System, Relationship, Tie, Connect, Connection, Faculty, Department
系外行星
xiˋ waiˋ xingˊ xing ˉ
Exoplanet, A planet beyond our solar system
Cat: Astronomy (Exoplanet) Next
rhymes-系外行星
Fragment (中文 to English)
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