If one event causes another similar event, which in turn causes another event, and so on, you can refer to this as a ~.
The ~ if one train is cancelled is enormous.
N-SING
If one event causes another similar event, which in turn causes another event, and so on, you can refer to this as a ~.
The ~ if one train is cancelled is enormous.
N-SING
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012