We will then keep the reports on file, and when a great deal of proof has been accumulated on any given incident, which is to say there are many "questionable points," only then will we begin an investigation. Thus we are fundamentally "passive."
當一件事件舉證累積得多了，也就是「可疑點」多了，才會進行調查，因此我們基本上是比較「被動」的。