瑜伽論記 1.156

1.156

或無間或有間者，景擬補闕云：若善等業一類相續，名為無間。善惡互起為有間。基師云：無間者，如作一業相續即成。有間者，若中途而息後方更作也。

Regarding 'either uninterrupted or interrupted': The Supplement by Jing states: If wholesome or other actions continue uniformly in sequence, it is called uninterrupted. Wholesome and unwholesome arising alternately is interrupted. Master Ji states: Uninterrupted means, for instance, performing a single action that is accomplished in immediate succession. Interrupted means resting halfway through and only performing it again afterward.