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单词 Oblate spheroid
释义

Oblate spheroid

原声例句
假如有如果

The true shape of Earth is called an oblate spheroid.

地球真正的形状被认为是扁球形。

Crash Course 天文篇

Vesta is round… ish, what's called an oblate spheroid, flattened a bit like a ball someone's sitting on.

灶神星是圆的… … 扁球体,有点像被人坐着的球。

中文百科

类球面 Spheroid

(重定向自扁椭球体)

类球面是一种二次曲面。二维的椭圆有两个主轴,称为长轴短轴。在三维空间里,将一个椭圆绕着其任何一主轴旋转,则可得到一个类球面。

用另外一种方法来描述,类球面是一种椭球面。采用直角坐标(x,\ y,\ z)\,\!,椭球面可以表达为

其中,a\,\!b\,\!分别是椭球面在x-轴与y-轴的赤道半径c\,\!是椭球面在z-轴的极半径.这三个正值实数的半径决定了椭球面的形状。

英语百科

Spheroid 类球面

(重定向自Oblate spheroid)
 The assignment of semi-axes on a spheroid. It is oblate if c < a (left) and prolate if c > a (right).
The planet Jupiter is an oblate spheroid with flattening ratio 0.06487 ± 0.00015

A spheroid, or ellipsoid of revolution, is a quadric surface obtained by rotating an ellipse about one of its principal axes; in other words, an ellipsoid with two equal semi-diameters.

If the ellipse is rotated about its major axis, the result is a prolate (elongated) spheroid, like an American football or rugby ball. If the ellipse is rotated about its minor axis, the result is an oblate (flattened) spheroid, like a lentil. If the generating ellipse is a circle, the result is a sphere. A spheroid has circular symmetry.

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更新时间:2025/6/23 5:14:53