根据张道真《实用英语语法》一书的说法,可以看作解释性插入语。
Further arrangements—and there may be many—between the NHS and DeepMind will be carefully scrutinised to ensure that all necessary permissions have been asked of patients and all unnecessary data has been cleaned.
请问老师,破折号之间的and there may be many是插入语还是其他什么成分?