jiū qí gēn yuán
- trace sth. to its source
- search to the bottom
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geostationarysatellite,
geostatistics,
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geostenography,
geostrategic,
geostrategist,
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相似单词
鸠夷,
究,
究办,
究根诘底,
究竟,
究其根源,
赳,
赳赳,
阄,
揪,