球型屋顶是一个形状像球体的结构。

The geodesic dome is a structure shaped like a piece of a sphere.

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虽然阳光呈直线照射，但光线在球型天空的投影却是巨大的圆形。

Now although sunlight indeed travels along straight lines, the projections of these lines onto the spherical sky are great circles.

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两门8毫米口径的机关枪分别被安装在车身两侧的球型固定底座上，做自卫之用。

Two additional Hotchkiss-type 8mm machine guns were fitted in positional ball mountings on either side of the upper hull for self-defense.

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a perfectly spherical shell dr at some distance, thickness, d r, dr we talk about it as 4 pi r squared d r, so we just multiply that by the probability density.

在某个地方的完美球型壳层,厚度，我们把它叫做4πr平方，我们仅仅是把它,乘以概率密度。

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