1.是activity的复数形式。activity:n.活动; 热闹状况; 活跃; (为兴趣、娱乐或达到一定目的而进行的) 活动。
2.Some governments have been victims and perhaps unknowing accomplices in the banks activities.一些政府成为了银行活动的受害者,而且可能在不知不觉中做了其帮凶。