There were some spiracle connected each other among the cover, column layer and the cone layer.
表层、柱状层和锥体层之间的气孔相互连
。
There were some spiracle connected each other among the cover, column layer and the cone layer.
表层、柱状层和锥体层之间的气孔相互连。
：以上例句、词性分类
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