穹丘的横断面为圆形或卵圆形。

The domes are circular or ovoid in cross-section.

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特别对圆形曲线的横断面曲线、缓和曲线等的计算步骤作了详细说明和推导。

Especially calculating procedures for circle curve by cross-section and transition cur-ve of the road have been expressed and derived in detail.

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实验表明，浮力射流的横断面内浓度呈椭圆形高斯分布。

It is shown that concentration in the jet cross-section takes elliptical Gaussian distribution.

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