沿海地区的砂质土壤，砂粒间的空隙也相对较大。

Sandy soils along the coast have relatively large spaces between the sand grains.

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这些微囊样空隙比分泌型脑膜瘤的大，而且其内没有圆形假砂粒体样结构。

The many cystic spaces are bigger than those seem in secretory meningioma, and do not contain spherical pseudo-psammoma bodies.

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