As one of populous artificial ecosystems in the ecology domain, the security of urban ecosystem is more fragile.

作为人口高度集聚的人工生态系统，城市生态系统的安全性更加具有脆弱性。

youdao

As one of populous artificial ecosystems in the ecology domain, the security of urban ecosystem is more fragile.

作为人口高度集聚的人工生态系统，城市生态系统的安全性更加具有脆弱性。

youdao