e/Prolate spheroidal coordinates

Information
has gloss	eng: Prolate spheroidal coordinates are a three-dimensional orthogonal coordinate system that results from rotating a spheroid around its major axis, i.e., the axis on which the foci are located. Rotation about the other axis produces the oblate spheroidal coordinates.
lexicalization	eng: prolate spheroidal coordinates
instance of	(noun) a system that uses coordinates to establish position reference system, coordinate system, frame of reference, reference frame

Meaning
Chinese
has gloss	zho: <div style="float:right;width:350px;"> 長球面坐標系是一種三維正交坐標系。設定二維橢圓坐標系包含於 xz-平面；兩個焦點 F_1}\,\! 與 F_2}\,\! 的直角坐標分別為 (0,\ 0,\ - a)\,\! 與 (0,\ 0,\ a)\,\! 。將橢圓坐標系繞著 z-軸旋轉，則可以得到長球面坐標系。（假若，繞著 y-軸旋轉，則可以得到扁球面坐標系。）橢圓坐標系的兩個焦點，包含於 z-軸。長球面坐標系可以被視為橢球坐標系的極限案例，其兩個最短的半軸的長度相同。
lexicalization	zho: 長球面坐標系

Media
media:img	Prolate spheroidal coordinates degenerate.png
media:img	Prolate spheroidal coordinates.png
media:img	ProlateSpheroidCoord.png