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jacobsite
释义
jacobsite
manganese iron oxide mineral, a member of the magnetite (
q.v.
) series of spinels.
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Unanimism
Unas
Una, The
unau
uncertainty principle
uncial
Uncle Sam
unconscious
Undenominational Fellowship of Christian Churches and Churches of Christ
underground film
Underground Railroad
Underhill, Evelyn
undersea cable
undersea exploration
undertow
underwater diving
Underwood, Carrie
Underwood, Francis Henry
Underwood, OscarW
undine
Undset, Sigrid
unemployment
unemployment insurance
Unequal Treaty
UNESCO
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