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2025-07-20

“focaloid”的英英意思

单词 focaloid
释义 focaloid Math.|ˈfəʊkəlɔɪd|
[f. as prec. + -oid.]
A shell, in general indefinitely thin, bounded by two confocal ellipsoidal surfaces.
1879Thomson & Tait Nat. Phil. §494 The attraction of a homogeneous solid ellipsoid is the same through all external space as the attraction of a homogeneous focaloid of equal mass coinciding with its surface.
“focaloid”的英英意思

 

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