;Depressed what distinction to have with spiracle?
郁闷跟
有什么区别？
；；呼吸Depressed what distinction to have with spiracle?
郁闷跟有什么区别？
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相互连通。
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