外生的

Single cancellous osteomas, unlike exostosis, are a relatively rare lesion in the external auditory canal.

单一性疏松骨瘤，不像生骨疣，是一道较少见的病灶。

The two major groups of mycorrhizal fungi are the ectotrophic and endotrophic types.

主要的菌根真菌有两种：内生和生。

There are three microscopic organizational modes of cyclic economy in the perspective of supply chain, i.e., green supply chain, endo-symbiosis supply chain and exogen-symbiosis supply chain.

摘要基于链角度提炼了循环经济的三种微观组织模式：绿色链、生共生体链和内生共生体链。