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Earth science
Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.
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青銅擺
Earth science; Mapping science
季米擺，由美國 S.海岸和大地測量，使用了鋁青銅由一個部件的鋁和銅的九個部分組成。從 1920 年開始，英華擺在美國 S.海岸和大地測量重力工作所取代了青銅擺。 ...
