成层

The Cleveland stratovolcano is one of the most active in the Aleutian Island chain.

克利夫兰层火山石是阿留申群岛活跃火山之一。

The obturated haemocoel was enclosed by the continuous and stratified basement membrane under the coelothelium and endothelial.

体腔皮和内皮下连续层的基膜围呼吸树中封闭的血腔。