成层

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

克利夫兰层火石是阿留申群岛链上最活跃火。

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

体腔上皮和内皮下连续层的基膜围呼吸树中封闭的血腔。